Old 10-04-15, 04:31 PM
ThermionicScott's Avatar
Join Date: Aug 2011
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Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)

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I haven't been using washers under my crank bolts -- should I?

Square-taper, that is.

All of the bottom brackets I've purchased in recent years (Shimano, IRD, Velo-Orange, and Tange-Seiki) included bolts like this, with no separate washers:

So I haven't been using any on my bikes. I haven't had any cranks come loose, ever, whether they had been installed for two months or two years. And there is always a reassuring amount of effort needed to crack the bolts loose when I do want to take the cranks off for any reason. It's for that reason that I hadn't given it much thought in 7 or so years of riding and fiddling with bikes.

On the occasion of reassembling my long-distance bike, it occurred to me to think about it, though. Is there a good reason to start using separate washers when installing my cranks, or should I keep doing what I'm doing?


P.S. Just did a little more Googling, and learned that crank bolts like mine are called "flange bolts" -- does the large flat area on the back of the head obviate the need for washers, then?
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
RUSA #7498

Last edited by ThermionicScott; 10-04-15 at 04:40 PM.
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