can anyone tell me where I can find a one-piece crank with three cog chain set? My 15 year old son needed a cheap sturdy bike to cycle/camp and lovingly fixed up one from the tip which did a great job around Normandy this summer. Neither of us realised until the pedal snapped off (duh!) that its large sized crank case and one-piece cast crank are now obsolete other than for BMX which of course don't have triple chain sets. Any help to avoid replacing the whole frame gratefully accepted!
sourcing replacement one-piece crank
- Thread starter andwill
- Start date
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Roadrider48
Voice of the people
- Location
- Londonistan
Maybe biggs682 can help.
raleighnut
Legendary Member
- Location
- One of the 'Elite'
Let me know if you do find a solution as my trike has a one-piece crank and single chainring but I'd love to fit a double or triple on to get lower gearing. (had to fit an electric front wheel so I can get up anything more than a moderate slope)
jagman.2003
Über Member
- Location
- Gloucestershire
Looking at the pictures. Are the three rings bolted on? Or is that just the chain guard?
Could you find another cheap/scrap bike & bolt the required rings on?
Could you find another cheap/scrap bike & bolt the required rings on?
raleighnut
Legendary Member
- Location
- One of the 'Elite'
How would you fit a pedal to the broken crankarm.
jagman.2003
Über Member
- Location
- Gloucestershire
You wouldn't.
But you could fit the three rings onto another one piece crank from a scrap bike.
I have found a couple of complete cheap bikes in skips. But they were only double ring.
KneesUp
Guru
Not got time to find a UK supplier, but would a conversion kit be easier?
http://www.sickbikeparts.com/catalog/product_info.php?products_id=56
http://www.sickbikeparts.com/catalog/product_info.php?products_id=56
This very nicely made bushing set allows you to mount a modern threaded cartridge bottom bracket unit in a frame made for the old-style "Ashtabula" one-piece cranks. This saves weight, improves shifting, and allows the use of modern clipless pedals. Be the first kid on your block to put a Dura-Ace crankset into your Schwinn Varsity!
Installation Note: Press in right side (left threaded) bushing first. Then draw in left side bushing by gradually tightening the allen head bolts. The bolts go through the left side and screw into the right side adaptor.
WebLink: Truvativ American-To-Euro Bmx Bottom Bracket Adapter
http://www.ebay.co.uk/itm/Bicycle-Bottom-Bracket-Converter-cVIDEO-American-to-Euro-Thread-BBT-Adapter-Bike-/281055427761?_trksid=p2054897.l4275
https://www.youtube.com/watch?list=UUyAGxVkwIhP6O5Ik2AIf7dQ?hl=en_US&v=4Swt6u8YrIY
Installation Note: Press in right side (left threaded) bushing first. Then draw in left side bushing by gradually tightening the allen head bolts. The bolts go through the left side and screw into the right side adaptor.
WebLink: Truvativ American-To-Euro Bmx Bottom Bracket Adapter
http://www.ebay.co.uk/itm/Bicycle-Bottom-Bracket-Converter-cVIDEO-American-to-Euro-Thread-BBT-Adapter-Bike-/281055427761?_trksid=p2054897.l4275
https://www.youtube.com/watch?list=UUyAGxVkwIhP6O5Ik2AIf7dQ?hl=en_US&v=4Swt6u8YrIY
Last edited:
raleighnut
Legendary Member
- Location
- One of the 'Elite'
Just what I've been looking for, now to find a UK dealer.
looks like this will be the answer - thanks to you guys for your comments and help
