Showing posts with label mechanic stuff. Show all posts
Showing posts with label mechanic stuff. Show all posts

Thursday, September 1, 2016

Will Specialized Fast Trak 29 x 2.0 tires fit a Surly Cross Check?

The tires look meaty and tough on the bike, but neither wheel will roll without buzzing contact with the frame and fork.
Uhh... nope. Not quite. After his recent visit, Nick left me a pair of Specialized Fast Trak Sport 29 x 2.0 tires. Though a little worn, they're nice tires with plenty of rubber left and a fast looking tread pattern. It was the perfect opportunity to see if a skinny (by current standards) 29er tire would have a chance of fitting my 58 cm 2001 Surly Cross Check. I did a little preliminary research and found reports of some success in fitting 50 mm Schwalbe Big Apples, and a couple of random 1.95 inch 29er tires on Cross Checks, but couldn't find anyone on the whole internet who had tried Fast Trak 2.0s. So here I am to provide that public service.

The results: close, but no cigar. The tires mounted on 20 mm wide Mavic MA3 rims measured out to be almost exactly 50 mm to the outer profile of the knobs. Maybe if I shaved off all the side knobs and had perfectly true rims, there might be a millimeter or so of clearance on each side. I'm not willing to do that. Maybe. However, I've been wanting some fatter tires to replace the pair of nearly worn out Bontrager 38 mm tires (measures out to 34 mm mounted on my MA3s) that I've had on the Cross Check for a long time. Even though the experiment failed, it points to the likelihood that something in the 1.8" to 1.9" (approximately 46-48 mm) wide would be about the right amount of fatness. I could probably even fit fenders with the right tire. I know the 700 x 41 mm Surly Knard is a sure fit, and equates to about 1.6" wide. However, I'm convinced there's a skinny 29er tire out there that will have sufficient clearance, yet push the envelope just a bit more. We don't have a lot of mud here in Colorado, and I wouldn't be riding muddy trails on this bike anyway, so minimal clearance is fine in my book.
Fast Trak 29 x 2.0 on the front.

Mavic MA3, 20 mm wide, on both front and rear.

Plenty of top clearance, not enough side clearance in the fork.

Right fork leg.

Left fork leg. Tantalizingly close to clearing, if not for knobs.

Yep, still 2.0. No better luck in the rear.

Axle slammed rearward in the dropouts.

Close, but not quite clearing the chainstays. 

Seatstays close to clearing, but not. Less room below the brake bridge than below the fork crown, but still adequate.

Saturday, October 11, 2014

There's always room for one more: DIY hanging bike storage

Lots of bikes don't necessarily have to take up lots of space.
Be forewarned, technical bike nerdery ahead. If you choose to follow the instructions, any outcome is your own risk and responsibility. Please don't attempt any construction if you are not confident in your skills.

Imagine that, one way or another, you've found yourself in a situation where you own more bikes than all your neighbors combined. Or, perhaps, you have a more culturally acceptable quantity of bikes (maybe shockingly as few a one), yet still find that you have more bikes than space for bikes. Alternately consider the not so farfetched possibility that you need to spatially justify a bike acquisition in order to maintain domestic tranquility.

In each of these cases, a better plan for bike parking could improve your life. Fortunately, a good solution is both cheap and easy, using utility hooks available at any hardware store, a few long screws, and some 2x4 or 2x6 scrap wood. You'll also need a drill, a saw, and some other common tools as needed.
The larger type hook on the left allows passage of fatter tires more readily, has a larger diameter steel core, and has a tougher coating than the standard type hook on the right. Bigger is better.
The above materials are combined into a bike hanging structure from which one or more bikes are hung from the wall by one wheel, thusly:
Alternating bars up/bars down for orderly and efficient bike hoarding.
The design of your bike hanging rig depends on a few factors:  1) the available wall space 2) the number of bikes you'd like to hang 3) the length of wood available.

The first step is to measure the length of wall where you'd like to hang your bikes. You'll need at least 20 linear inches of wall for every bike you want to hang. It may require even more space if your bikes have especially wide handlebars, which is the main determining measure. The minimum height of the wall is the length of your bike plus about 8+ inches, so as to keep the bottom tire off the floor when hung.

Next, is to measure and drill holes in the wood in which the utility hooks will be installed. In my experience, a distance between holes of approximately 18 to 20 inches works well to maximize used space while maintaining relative ease of bike removal when hanging bikes in an alternating bars up/bars down pattern. Therefore, the length of wood you'll need can be calculated as in the following example for a 3-bike rig with hooks spaced 20" apart:

  • 3" (edge to first hook) 
  • + 20" (first hook to second hook) 
  • + 20" (second hook to third hook) 
  • + 3" (third hook to edge) 
  • = 46" board length 

Remember, the linear length of wall you'll need is longer than the board length, to accommodate the handlebars of the outer bikes. In this example, the wall will need to be at least 60 linear inches.
I used three 3 1/2" deck screws anchored in a wall stud to attach the 2x6 board to the wall. The more studs, the better, as they say.
Drill the first hole into the centerline of the wood, three inches inboard from the edge of the wood. Again, be sure to allow for the distance necessary for the bike's handlebar to clear the neighboring wall. Note that it is important to drill the holes for the utility hooks angled downward about 15 to 20 degrees to relieve stress on them, as the weight of the bike pulls them down. If installed perpendicular to the wall, the utility hooks will bend downward.
Note the hook angled downward.

I installed these hooks about 18.5" apart on center, in the days before the wide bars that I now so enjoy. I'd lean more toward 20" apart if I were to rebuild.
Subsequent holes should be approximately 18 to 20 inches apart. Once all the hook holes are drilled, it's time to mount the boards to the wall. I use 3 1/2" deck screws in every stud along the length of the board. Be sure that the screws are solidly in studs, as it wouldn't be much fun to have your bike hanging rig and bikes all collapse on the floor. It is beneficial to have a stud located near each end of the board. Use a level to ensure the board is parallel to the floor, and be sure to have it high enough so your longest bike's rear tire clears the floor. The utility hooks can be installed either before or after the board is screwed to the wall.

Two 29ers with 750+ mm wide handlebars are a little snug on hooks 18.5" on center. I may respace the hooks to be a bit further apart.
In the case that you've got fatbikes to deal with, such beasts still work fine for hanging. However, a standard utility hook won't work. Many hardware stores carry a variety of hooks that can successfully grasp a fatbike wheel. I found a heavy duty hook that is about 5" wide that fits the Surly Darryl/Larry combo on my Pugsley.
Pugsley peacefully coexisting with my 30 year-old Miyata. Wide bars on both.

Fatties fit fine.
Just about any bike can be hung using this kind of rig, so long as the bike isn't so heavy that it will pull the hook out of the board. To date, I've hung bikes up to about 60 pounds in weight, with no problem other than hefting a wheel up to the hook.
These hefty old Schwinns hang just fine.
So there you go. I can't claim that this is the definitive method for storing bikes, but I don't know of any other way that is as cheap, easy, or efficient. Bikes hung in this manner remain simple to retrieve for a ride, they won't fall over and get scratched against each other, and the positive aura emitted from a wall of bikes embiggens any aspiring bike barn. Such a rig can also keep an overly abundant bike herd orderly enough so as to support domestic tranquility, though your mileage may vary.



Tuesday, November 19, 2013

Wherein I venture into the world of big wheels

Black and yellow 2008 Redline Monocog 29er.
For more than a year I've conceptually evaluated the idea of myself on 29-inch wheels. I've had intermittent rides on several big-wheeled bikes, interplayed with a continuous internal discussion weighing the tradeoffs of wheel size, proportions, etc., and underlaid with convoluted self-justification for bike acquisition. All the while, I've been selling off underutilized bikes and equipment with a goal of more easily managed rolling stock. When a used 2008 Redline Monocog 29er frameset showed up on Craigslist priced entirely too reasonably, my last excuse was vanquished.

New-to-me 2008 Redline Monocog 29er, size XL (21").
As long as it has wheels and she gets to run along with it, Scout approves.
I really like the Monocog's Atari-esque '80s style graphics. 
The plunge was made easier by the fact that since I'd been clearing out the stable a bit, I'd built up a decent bundle of bike spendable loot from the proceeds. At the same time, many of the parts to build out the frame had either been in my stash for years, or had recently shown up, meaning that it wasn't much of a stretch to finish out the build. However, instead of just using only whatever parts I had on hand, I decided to splurge a little. The Monocog would be more than a personal testbed for 29" wheels, but also for a few key pieces of equipment that I've been wanting to try for some time. After cleaning and waxing the frame, I got down to the fun of putting it all together.

Nothing groundbreaking here, just dependable Avid BB7 disc brakes; 160mm rear, 180mm front. The Redline chain tensioners make for rock solid wheel placement. A 20-tooth Surly cog is obscured from view. 
Even though the frame came with a square taper bottom bracket, I opted for the 175mm TruVativ Firex crankset Gypsy Nick left with me during his last visit. I installed a new Surly 32-tooth ring and a bash ring.
VP Components VP-001 pedals are much flashier than their name implies. Gold, of course, to complement the Monocog's Pac-Man graphics.
Nicely wide Salsa Rustler Bar 2, Ergon GP1 BioKork grips, and Avid levers finish off the controls.
As I was making plans for what I wanted to do with the Monocog, a non-negotiable element was to be a wide handlebar. I'd initially wanted to find a 780mm wide Salsa Whammy bar that I so enjoyed on the Surly Krampus, but they seem not to exist outside of the stock Krampus parts kit. Instead, I discovered the 750mm wide Salsa Rustler 2, as newly spec'd on the stunningly cool Salsa Horsethief. The Rustler features the same 11 degree backsweep as the Whammy, but with a preferable (to me) 15mm rise and 6 degree upsweep compared to the flatter Whammy.

The Salsa Rustler bar does not disappoint. The frameset came with a no-frills Redline 100mm stem with a 31.8mm clamp area that, when mated with the Rustler, makes for a super stable and confidence inspiring tiller. I can't believe I rode with much narrower bars for so many years, as was the style beginning in the late '80s and continuing for a couple of decades. I remember having bikes back in the old days with bars in the 540mm neighborhood, some of which I cut down even further for some long forgotten reason.

I finished off equipping the frameset with a few odds and ends from my parts bin, including a Thomson Elite non-offset 26.8mm seatpost, a Specialized saddle, the single-speed WTB rear wheel from Julie's Raleigh XXIX, an off-the-shelf WTB/Deore front wheel, and a pair of barely used WTB Exiwolf 2.3" steel-bead tires. Decent, pragmatic, journeyman-type parts to mix in with the sparkly, splurgy new bits.

However, I wanted to enter the 29er world fully, and felt the transition demanded something more. In this new world, tubes would be a thing of the past. I explored the options and decided to go with what some term 'ghetto' tubeless, but what I will call, for a more enlightened audience, 'handyman' tubeless. I pieced together the process from a number of online resources, of which vast numbers can be found with a quick search. It seems to me that the 'handyman' method has many more than one correct answer, much like any handyman endeavor.

At this point I'm certainly no expert, but I'll outline what worked for me in the following photos.

Start with the bare rim. I inserted the wheel in a truing stand for convenient access, then cleaned the rim with rubbing alcohol and let it dry.
One inch (25.4mm) wide Gorilla tape is inexpensive and comes in a roll long enough for about four 29er rims.
The Gorilla tape fit just inside the bottom of the channel of my WTB Speed Disc rims (labeled 26mm) just right, without going up the sides where the tire bead will be seated in a subsequent step. I overlapped it about 6 inches at the valve hole.
I cut an x-slit in the tape over the valve hole. I then cut the Presta valve assembly out of a damaged tube, and inserted the valve through the slit in the tape. Next, I  tightened the valve stem retainer nut down to force the rubber around the internal valve opening into the rim channel, making a seal. 
The next step is to install the tire (sans tube) on the rim, and thread on a Presta to Schrader adapter, if, like me, your air compressor is Schrader only.  
These items come in handy.
At this point, a test inflation helps to determine if your tire/rim combo will work tubeless, or if it will need some adjustment. I used the compressor to air up the tire, quickly at first, then somewhat more cautiously until I heard a couple of popping sounds signifying the air pressure seating the tire beads on the rim. Most resources agree not to inflate to more than 40 psi, lest risking the bead blowing off the rim. Sometimes a little soapy water on the tire bead can help it seat. With the tire/rim combo holding air, the test is a success. On to adding some sealant to make sure that the air stays put, regardless of what the tire may encounter. The next step is to pop part of the bead on one side of the tire to the outside of the rim, in order to make a gap to inject some sealant.
I used a little more than 2 ounces of Stan's sealant per tire, assisted by a syringe. Once the sealant is in, pop the bead back into the rim and air it up again. Remember, 40 psi max.
Once the sealant is in and the tire full of air, spin the wheel around, twisting and turning it to ensure sealant is spread all over the inside. The sealant quickly found and patched a hole in the tire, as evidenced by the gooey spot on the tread in the photo above. Hooray! 
I've now been riding the Monocog for a couple of weeks, and have really been having a lot of fun. With a single gear, I know that the bike's performance anywhere vertical would suffer, mostly due to the limitations of its human engine. However, it's fast on the rolling suburban dirt trails around where I live, and the simplicity of the whole setup makes me feel a bit like a kid on a BMX. The handyman tubeless setup has been working flawlessly, and I've since found some home brew sealant recipes that I may try sometime down the line.

I will say that even at this early stage, I have to deem this experimental testbed a success. Unsurprisingly, I've confirmed that the big 29" wheels feel more proportional to my body size than standard 26" wheels ever have. The bike also has an instant familiarity to me similar to that of my Pugsley, with its similar rolling diameter on 26" x 3.8" fatties. Added to that, it is astonishing how a wide handlebar creates a nearly perfect symbiosis between rider and bike. If you've never tried wide bars and are an XL-sized dirt bike nerd like me, going wide may change your off-road life forever. Any dirt bike with a bar much narrower now gives the impression that I'm on a tiny circus bike.

So far, I'm really impressed with the Monocog. Though its straight-gauge 4130 chromo steel tubing makes it ipso facto not a light weight, the bike feels well balanced and spritely, which is what matters to me. I don't know what it weighs and don't particularly care.

Time will tell what the future holds for this bike. Perhaps some gears at some point, possibly via internal hub. Maybe a 100mm -ish suspension fork. Hopefully some camping. In the mean time, I can say with confidence that the Monocog is vying for top ranking with the Pugsley as the best dog bike in the household, and will likely rack up more than its share of outings over the coming months.

Test fit: a Revelate frame pack built for a 20-inch Pugsley on the XL Monocog.

Sunday, October 20, 2013

Visit from Gypsy Nick and a Global Lael

Ready to embark on the Kokopelli Trail.
I've once again been lax on upkeep of this blog. However, a recent visit from world-cruising friends has spurred me to action. Nicholas and Lael returned from exotic locales to the U.S. at the beginning of the month, and paid us a visit. They have both toured extensively in many places; in my opinion something well worthy of envy, especially from my captive suburban vantage point. Therefore, whenever they hit our town, it's great to catch up with them and benefit from the glow of their journeys.

By the way, those of you interested in tales of distance and daring aboard two-wheels, would do well to pick up the latest copy of Bicycle Times, Number 25, in which Nicholas has a featured story about his travels from Alaska to New Mexico on his purple Pugsley last year.
Yes, that's Nick's story featured on the cover of Bicycle Times.
If you happen to encounter this traveling duo, a tasty dividend may be the reward of hosting them for a night or two. Fresh from a trip to Ukraine, Nick and Lael whipped up a traditional Ukrainian meal, complete with handmade varenyky. Delicious and fun. Big Sis really enjoyed helping them seal potato-based filling into dough pockets. At the end, they made a bolshoi verenyk (correct singular form?) out of the last chunk of dough.






A special treat of Ukrainian chocolate.
My humble bike barn served as R&R facility for their bikes, as the two travelers refitted their steeds for the journey ahead. An unused Salsa Anything cage of mine was pressed into service to replace Nick's cracked equivalent. They left me with a few worn parts that they replaced with new. Their old parts will assuredly find service on one project or another around here.
Nick's Raleigh XXIX+G partway through refurbishment. My 1967 Velosolex 3800 languishes in the background.

A little more than a year ago, I donated a set of NOS Suntour XC Comp shifters to Lael's nascent mountain bike. As of now, they've logged multiple thousands of miles on her Raleigh XXIX and appear to be ready for more.
Once Lael and Nicholas had at least partially caught up on some sleep and had gotten their bikes mostly in order, they were ready for the next leg of their adventures. Watching them pack up, it is readily apparent that they are seasoned and efficient in what they choose to bring and how they carry their gear.
Hard to believe that Nick's bike is loaded with all he needs for daily life, in addition to several bottles of Ukrainian vodka and other gifts for down the road.

Lael's bike has the look of a well-honed machine suited for whatever lies ahead.

As they rode away, Scout looked up as if to ask why we weren't going with them.
As an addendum, Nicholas helped me to hook up with a new-to-me micro four-thirds format Panasonic DMC-G3 camera body coupled with his own well-traveled Olympus 14-42 lens. As is evident on his blog, he has become quite an accomplished photographer in the past couple of years, and with this equipment, I hope to make improvements to my own skills.

Thanks for the leg up, Nick! Happy travels to you and Lael, and we look forward to your next visit.
Panasonic DMC-G3 as shot by my low-resolution phone camera.