's Forum Archives - Components

Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )

RX-100 Crank Replacement w/o New BB?(4 posts)

RX-100 Crank Replacement w/o New BB?coifmo
Jul 20, 2003 7:30 AM

Stripped the right side pedal threads off my old RX-100 double yesterday (1992-93 Trek, no STI of course).

This is a semi-retired back-up bike, so I've got some time to look for another RX-100.

But could I replace it with something else without creating compatibility or chainline issues? I'd just as soon not do the BB on this bike if I can avoid it.

Don't want to scrap the bike, but don't want to put money in it either.

Moral of the story, by the way, is make sure you properly tighten your pedals when changing changing them out for your girlfriend to ride.
re: RX-100 Crank Replacement w/o New BB?Rusty Coggs
Jul 20, 2003 11:25 AM
Sure,if you can find something in JIS taper with the same spindle length. different generations of rx-100 used different spindle lengths. If yours is 107mm,thats the same that 8 speed 105 cranks used,and if 113/115, a 8 speed 600 crank will work.
re: RX-100 Crank Replacement w/o New BB?coifmo
Jul 20, 2003 3:37 PM

Nothing's ever simple.

What's a JIS taper - refers to the spindle, I presume?

And is there a simple way for a guy w/o calipers to measure the spindle length?
Might not have to measure.Spoke Wrench
Jul 21, 2003 10:59 AM
Find a replacement crank. If you happen to live in an area that has a bicycle swap meet, that'd be perfect. There will be lots of replacement cranks to choose from. Be sure to point that out while you are dickering with the seller. If you pay more than $12.00 or so, you're a fish.

Test fit your new crank onto your bike. If the little chainring misses the chainstay by about 2mm to 5mm, enjoy the fruits of having lived a virtuous life and go with it. If it doesn't, mutter an expletive of your choice, pull out the old BB, estimate what difference you need and buy a UN52 in that length.