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  1. #1
    Senior Member gbalke's Avatar
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    Jul 2008
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    West of St. Louis
    My Bikes
    (3) 1970's Raleigh Sports, (1) 1968 Robin Hood 3 speed, 1974 Raleigh Grand Prix, 1976 Raleigh Grand Prix, 1969 Peugeot UO-18, 1971 Peugeot UO-08, 1980 Giant road bike, 1954 Humber, 1940ish Hercules Popular, 1963 Dunelt, 2007 Trek 3700 mountain bike
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    Raleigh Twenty cranks

    The right side crank arm on one of the Raleigh Twenty's I picked up today is bent inward. I thinking that the cranks used on the Twenty are the same as those used on a Raleigh Sports? Can anyone confirm this?
    1968 Robin Hood 3 speed...1970's Raleigh Sports Pathracer
    1972 Raleigh Sports............1973 Raleigh Sports
    1974 Raleigh Grand Prix......1974 Raleigh Grand Prix (made in Holland)
    1969 Peugeot UO-18...........1971 Peugeot UO-8
    1980's Giant Project.............2007 Trek 3700 mountain bike
    1971 German 3 speed.........1977 Motobecane Super Mirage Mixte
    1970 Raleigh Twenty...........1972 Raleigh Sports (donor bike)
    1954 Humber Sports (my newest project)

  2. #2
    Senior Member
    Join Date
    Jul 2005
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    New Haven, CT area
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    Trek 7.5 Hybrid, Trek 1.1 Road, Holdsworth touring,Raleigh International,Ritchey Commando,Italvega Speciallissimo,et.al.
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    Was the 20 a folding bike ? If so, I think that the answer is no - smaller chainwheel size and shorter crank arm length.

  3. #3
    Senior Member
    Join Date
    Jun 2008
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    angus scotland
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    Grifter BSA 20
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    Ive straightened steel cranks
    take them off and clamp the bb end of the crank in the vice
    then slip a scaffold pole over the arm and lever it straight.
    It might be bent sideways as well as into the bike. can clamp an adjustable spanner on the pedal end of crank. then use the scaffold pole over its handle to straighten that.


    as said by Jacksbike. The crank length and cog size is likely to be bigger on the Sports.
    the actual spindle diameter will be the same though.
    Raleigh used there own size, so its difficult fitting other manufacturers cranks on Raleigh spindles

  4. #4
    Old fart JohnDThompson's Avatar
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    Nov 2004
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    Appleton WI
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    Quote Originally Posted by jacksbike View Post
    Was the 20 a folding bike ? If so, I think that the answer is no - smaller chainwheel size and shorter crank arm length.
    Arm length should be about the same, but a larger chainring was used to get the proper gearing with the smaller wheels.

  5. #5
    Senior Member
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    Make sure the BB isn't damaged. A blow that would bend a steel crank may bend the BB shaft as well or damage the bearings

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