Technical & Reference Section > Tech and Restoration
Cranks for a PK Ripper
SteveG:
I had a 1 piece fitted on my one. It would have been nice to have a 3 piece like a Flight crank but as it was I had to just look at the bare frame for quite a few weeks before I could get some bits to build it !
A lot of the guys thought that the 3 piece cranks like the Maxy Cross and Suntour were a bit weak although this was mainly due to the axle nuts being kept tight. Once they came loose the alloy arm would get damaged and the cranks would be scrap.
Sugino did a crome moly 3 piece crank but I only saw 1 of these, stronger than an alloy one but probably heavier than a 1 piece.
Even a few of the guys that used to race and had Flight Cranks had problems with the pinch bolts coming loose. Riding round with the long allen keys in the pocket wasn't a very good idea !
In the end a lot just has a 1 piece crank, heavy but pretty indestructable. When I tidied up my Ripper a while back I fitted the Maxy Cross crank my Brother had on his bike. The only problem I ever had was when using a coaster brake as the 1 piece crank spider used to move, not a problem with the 3 piece one.
To answer your question the bottom brackets are different and I think there were two thread sizes available for the 1 piece so make sure you get the right one.
Rodgy1970:
--- Quote from: spaceman™ on November 27, 2010, 09:08 AM ---Think Rippers look far more 80's with a good quality OPC...rarely seen a ripper with a 3 PC round our way back int Day.
Same with quads as well. :daumenhoch:
--- End quote ---
Do think the DX's look really well but have to agree with you only bike I ever saw BITD with 3PC belonged to a sponsored rider.
simo27:
--- Quote from: SteveG on November 27, 2010, 10:22 AM ---I had a 1 piece fitted on my one. It would have been nice to have a 3 piece like a Flight crank but as it was I had to just look at the bare frame for quite a few weeks before I could get some bits to build it !
A lot of the guys thought that the 3 piece cranks like the Maxy Cross and Suntour were a bit weak although this was mainly due to the axle nuts being kept tight. Once they came loose the alloy arm would get damaged and the cranks would be scrap.
Sugino did a crome moly 3 piece crank but I only saw 1 of these, stronger than an alloy one but probably heavier than a 1 piece.
Even a few of the guys that used to race and had Flight Cranks had problems with the pinch bolts coming loose. Riding round with the long allen keys in the pocket wasn't a very good idea !
In the end a lot just has a 1 piece crank, heavy but pretty indestructable. When I tidied up my Ripper a while back I fitted the Maxy Cross crank my Brother had on his bike. The only problem I ever had was when using a coaster brake as the 1 piece crank spider used to move, not a problem with the 3 piece one.
To answer your question the bottom brackets are different and I think there were two thread sizes available for the 1 piece so make sure you get the right one.
--- End quote ---
Thanks for the advice Steve, will keep a close eye on that, think I will go for a 1pc. Will keep you posted!
58 delray:
--- Quote from: rodgy on November 27, 2010, 10:23 AM ---
--- Quote from: spaceman™ on November 27, 2010, 09:08 AM ---Think Rippers look far more 80's with a good quality OPC...rarely seen a ripper with a 3 PC round our way back int Day.
Same with quads as well. :daumenhoch:
--- End quote ---
Do think the DX's look really well but have to agree with you only bike I ever saw BITD with 3PC belonged to a sponsored rider.
--- End quote ---
most of us round my way had flights or profiles bitd after getting tired of bending OPCs
bit hard to see but, my ripper bitd with 185mm flights
simo27:
Good photos!! What year was that ?
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