26-04-2019, 07:30 AM
Hi John,
The SPEEDEX site is under reconstruction, kindly to be hosted by the A7CA (note to self; must get my finger out with it).
The rear levers you describe are for the short lived 1936 models to go with the oval backplates and shoes (some are cast iron, some aluminium) with the offset pivot. The rears should be 2 1/4" between centres and matched, on a standard set up, with front levers 2 3/8" between centres. The 1936 fronts look like Girling type ball ended levers but without the recess for the felt washer. As you point out the rear levers are handed, the eye is twisted slightly to match the approach angle of the cable, they should be installed leaning in towards the backplate.
Usually Bowden front levers are cranked (and handed) with 2", 2 1/4" or 2 3/8" between centres and came with equal length straight rear levers. I'm not sure how much science went into the design of these but some extra leverage, at a cost of pedal movement, is probably not a bad thing.
These standard rear levers are probably better than the short Bowden ones, equivalent to the mid sized ones and only slightly shorter than the 2 3/8" ones. They should work fine on a Bowden set up in my opinion.
Hope of use, Dave
The SPEEDEX site is under reconstruction, kindly to be hosted by the A7CA (note to self; must get my finger out with it).
The rear levers you describe are for the short lived 1936 models to go with the oval backplates and shoes (some are cast iron, some aluminium) with the offset pivot. The rears should be 2 1/4" between centres and matched, on a standard set up, with front levers 2 3/8" between centres. The 1936 fronts look like Girling type ball ended levers but without the recess for the felt washer. As you point out the rear levers are handed, the eye is twisted slightly to match the approach angle of the cable, they should be installed leaning in towards the backplate.
Usually Bowden front levers are cranked (and handed) with 2", 2 1/4" or 2 3/8" between centres and came with equal length straight rear levers. I'm not sure how much science went into the design of these but some extra leverage, at a cost of pedal movement, is probably not a bad thing.
These standard rear levers are probably better than the short Bowden ones, equivalent to the mid sized ones and only slightly shorter than the 2 3/8" ones. They should work fine on a Bowden set up in my opinion.
Hope of use, Dave