Crank Arm Replacement
#1
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Crank Arm Replacement
Last week I had mentioned that on a long climb our granny chain ring had worked loose and I wasn't able to tighten it on the road. Thursday evening I went to my LBS and we took the crank off and found the threads stripped with no hope of salvaging using longer bolts or something. First thing Saturday morning I talked with Tandems East and was able to drive over and pick-up a replacement Race Face triple 170 crank arm. Back to the LBS and we were able to bring the rings across after replacing the mangled granny and had us on the road to take advantage of the 65 degree weather this past weekend. Mel was gone but we were able to figure things out with his guys over the phone.
I always love going to Tandems East and look at all the bikes he has on hand, from a used Trek or Sterling to new Cannondales, Co-Motions, Calfees and Sevens. It's a two-hour drive but worth it every time.
One fun thing, my LBS has a small machine shop and he is trying to salvage the original crank arm.
I always love going to Tandems East and look at all the bikes he has on hand, from a used Trek or Sterling to new Cannondales, Co-Motions, Calfees and Sevens. It's a two-hour drive but worth it every time.
One fun thing, my LBS has a small machine shop and he is trying to salvage the original crank arm.
#3
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The shop wasn't able to find a helicoil so is machining an insert. He's just having fun with it in know.
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Not to take over your thread, but it is an appropriate place for my question. Is there any reason why a stoker crank couldn't be a 165, and the captain's crank a 175? Or do they have to be the same size? My wife is just a little too small for ours realistically, and I was just thinking earlier today about maybe making the switch.
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Not to take over your thread, but it is an appropriate place for my question. Is there any reason why a stoker crank couldn't be a 165, and the captain's crank a 175? Or do they have to be the same size? My wife is just a little too small for ours realistically, and I was just thinking earlier today about maybe making the switch.
#6
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I run a 175 front, 170 rear and about 140 mid position on a triplet. No reason not to have differing lengths depending on rider. Crank arm shorteners are also a choice, but are likely to be less than the 165 that you mentioned. The shorter crank arm also makes it so that the seat does not have to be lowered as far, or allows a shorter rider to ride on the back if the saddle is at the bottom of its possible height.
#7
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Not to take over your thread, but it is an appropriate place for my question. Is there any reason why a stoker crank couldn't be a 165, and the captain's crank a 175? Or do they have to be the same size? My wife is just a little too small for ours realistically, and I was just thinking earlier today about maybe making the switch.