Re: [yak] Digest for yak@bikefriday.com - 4 updates in 1 topic

[robert clark]

If just the pedal thread is the issue  there is a threaded steel insert that can restore the thread and being steel once it is installed 

  the repeated pedal reinstallation for travel packing   will have a more durable surface.....  

On Sun, Apr 19, 2026 at 6:57 PM <y...@bikefriday.com> wrote:

y...@bikefriday.com

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• Replacing an old crankset - 4 Updates

Replacing an old crankset

John S. Allen <jsa...@bikexprt.com>: Apr 18 10:02PM -0400 Hello,, I own a 1997 NWT which I bought refurbished from the factory in 2005.   The threads of the cranks for the pedals are munged up from repeated installations including an attempt to install pedals on the wrong side. I need to replace these cranks.   Description:   * Square taper * 74 and 110 mm 5-hole bolt circles. * The bike originally came with a single 44T chainring in the middle position and a trouser protector disc in the outer. position. * The cranks are painted black * They bear the lettering Shimano VIA 170 on the back, which is concave. * *The cranks are very "bow-legged" for extra clearance at the chainstays.* * Unusually, The bolt holes for the 74mm bolt circle are essentially level with the inner face of the crank around the spindle hole.   I installed a replacement left crank, and because it is not as "bow-legged", it will interfere with and damage the quick release of the rear brake if that is open.   I tried to install a replacement right crank (Sugino AT) and it would not work because the bolt circles are closer to the bicycle's centerline.   I see a Shimano crankset on eBay which looks similar but I am not sure -- https://www.ebay.com/itm/389859392083. And it is 175mm, which I don't want.   Can y=anyone supply a crankset, used OK, from a bicycle which has been refurbished with another crankset, or point me to where I might purchase one? If I can't get one as "bowlegged", I'll have to replace the bottom bracket with one that is longer on both sides. That also might be an option. but I'd rather just replace the crankset.   -- John S. Allen   CyclingSavvy Instructor League Cycling instructor Author, Bicycling Street Smarts Technical Writer and Editor, sheldonbrown.com

Vince Mackenzie <deniab...@gmail.com>: Apr 19 08:11AM +0100 When we built up bikes in the uk. We used to buy shimano rsx triple chainsets. The outer ring was moved to the middle. This worked with a 110mm bb. Hope this us of some help. Vince

frkrygow <frkr...@gmail.com>: Apr 19 09:39AM -0700 I'm surprised the pedal threads can't be repaired, maybe by careful use of a tap (starting from the backside). If pedals aren't frequently removed, could that plus some version of Loctite (blue or the even weaker purple) do the job?   Failing that, I thought that there were Helicoil or similar inserts available. But I admit I never encountered that problem.

Walter Lapchynski <w...@bikefriday.com>: Apr 19 09:46AM -0700 I'd use the tap first, too. A lot of times the issue is the first few threads.   The Helicoil is a great idea, but it would require a significant enlarging of the pedal hole, which ultimately should be done with a mill. That said, it's not a job for your average home mechanic.   Cranks running into linear pull brakes that are open should be expected. I'm a little shocked that there's any crank that would clear them. That said, any replacement crank should do the trick. I think most would probably prefer a crank with less of a Q-factor anyways.   Finally, I'll recommend MKS Ezy pedals as a better solution for travel. The pedal body and axle quick release off a small coupling that stays in the crank. This eliminates the need for a pedal wrench and all but removes the possibility of encountering similar problems. They have a wide array of options, including some quick release ones. And they're fantastic pedals on their own right.     -- Walter Lapchynski Sales Consultant | Information Services Assistant Green Gear Cycling dba Bike Friday direct line +1 541-234-5126

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[robert clark]

helicoil is a diamond shaped coil of wire   the other is a steel  tube threaded inside and out  process similar  

[robert clark]

aluminum tapped a bit larger , inside of insert is 9/16 inch pedal thread  standard..