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I've got an original Cotic Roadrat and am running the original groupset. However, a few years ago I damaged the thread on the left crank arm and replaced it with one 5mm shorter than the original. I know want to put a 175mm Sora back on the left to balance the crank lengths. I'm not sure if this one for sale will fit? How can I find this out?
https://www.tredz.co.uk/.ETC-Shimano-Pattern-Cotterless-Left-Hand-Crank-Arms_45882.htm. Also, do I need any special tools to do this job?
Alternatively, does anyone want to sell/give me a crankarm? thanks,
Tom
it depends what the driveside crank/BB is.
Can you take a pic?
Thanks, here are a few pics.
https://drive.google.com/open?id=0B_yMKrXp1fztTjVKdmZBcTYyZU5oUzhzMGxXc3R6R1RtZlNz
https://drive.google.com/open?id=0B_yMKrXp1fztQjl5bW9vZjVrZTBEcEhrY2d1eTRkcWJNSG5J
https://drive.google.com/open?id=0B_yMKrXp1fztQXdacWtKdW9wM19WYUozQndFWlB0NXExOFlj
https://drive.google.com/open?id=0B_yMKrXp1fzta0RscWdVNVB0VWs2clhHNG5hamVzTmZjcjFV
The driveside crank is a Sora 175mm.
Anyone willing to help me out?please!
OK, I think the crank you have is a Sora 3500, that’s a HT2 crankset and the one you’ve linked to won’t work. You want a left hand road HT2 crank, this one should work I think. Make sure it’s from a road group set (105, Sora, Tiara, etc.).
https://www.sjscycles.co.uk/cranks/black-170-shimano-105-fc5700-left-hand-crank-arm/
thanks for the help!