Classic & Vintage - Need 1972 Raleigh Grand Prix Help
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.
08-26-12, 03:11 PM
I have what I believe is a 1972 Raleigh Grand Prix. This morning I was riding and basically blew up the large front sprocket. It is now bent and I need to remove it. My biggest question is what is the safest/most correct way to take of the cranks so I can remove/replace the sprocket?
08-26-12, 03:49 PM
08-26-12, 03:59 PM
Should be moved to Bike Maintenance Thread.
If it is a Stronglight or TA (not likely) crank, you need a $50 adapter to pull the cranks. Other JIS cranks a standard Park or Pedro's crank pullers will work. In lieu of that, go to Harbor Freight (http://www.harborfreight.com/automotive-motorcycle/pullers/3-piece-two-jaw-puller-set-40966.html). Or try a LBS that handles vintage bikes.
It's a good opportunity to clean and lube your BB.
I cannot tell from your photo whether the large sprocket is integral with the spider, but I suspect from your question that it is. If a standard cotterless crank puller threads smoothly and securely into your crank, you do not need a weird-size French adaptor. If the puller feels wiggly when threaded into the crank, STOP before you damage the crank.
08-26-12, 04:52 PM
Got it. Thanks guys.
Powered by vBulletin® Version 4.1.12 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.