Shimano RX100 crank replacement

DomCotton said:

I recently got a second hand road bike from ebay, a peugeot. Cant tell you the model or age or anything like that. It came fitted with Shimano RX100 components. I have a problem with the crank arm on the side with the cogs (please excuse my lack of understanding with the technical info!) the pedal has worked loose and trashed the thread, and now the pedal slides in and out of the crank arm - not good! After searching for a replacement part I have discovered that it is somewhat old kit and hard to find.

What I am looking for is a suitable replacement. I am not an expert, and am only cycling to work and back at present, however i do hope to get into it a little more. I have read about the Shimano 105? Is this the next model? I dont want to spend a lot of money. Another thing i realise that there are many different center hole types (a square one amongst others) can anybody help me out with any other brand that may be suitable?

You can substitute almost ANY square taper SHIMANO crankset for your damaged crankset ... eBay can/should be your source, again ... figure $15-to-$100 depending on your inclination and the condition/rarity of the crankset AND the chainrings on the crankset.

ASK the seller about the condition of the tapers & threads!

Be sure the crank arm length is what you want to use -- e.g., 170mm (it is usually stamped/etched, or cast on the backside of the crankarm ...).

Roughly, in descending order: Dura Ace / Ultegra 600 / 105 / Tiagra / etc.

You will need a crank puller, if you don't have one already.

DON'T spend more than $80 for a replacement, square taper crankset, because at about $50+, your options increase manifold for "used" cranks (some people change purely for the sake of change).