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Help, what size chainring bolts?

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Help, what size chainring bolts?

Old 03-26-20, 01:58 PM
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Help, what size chainring bolts?

Help, what size chainring bolts?

Hi unfortunately locked down so can't go to LBS for help and I snapped a chainring bolt. Hoping I can get some sent from overseas. Question what size chainring bolt do I need for these chainrings?

Many thanks as always.
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Old 03-26-20, 02:23 PM
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Easiest way to match it is to remove another one and get accurate measurements.
The are a limited number of options, it will only take a few minutes to check.
I have a few available once you get the measurements.
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Old 03-26-20, 05:02 PM
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I just had to replace a busted small chainring,and hunt down the correct bolts. As I was recently told by our best local shop, the bolt diameters tend to be standardized, but the lengths can vary. My set-up is the same as yours, 2 chainrings, 110 BCD, and I just got this set of these 8.5mm Truvativ steel bolts, and they fit like a glove.
And, I ordered last Saturday afternoon, and they made it across the country to my mailbox in Georgia less than 48 hours later (and for a mere $3 shipping) !
Here's a link.......

PS, another positive side of these are that both sides are tightened with an Allen (hex) wrench (a 5 and a 6mm). Many of them seem to have an Allen on one side, and something kinda like a flathead screw slot on the other, that I believe is actually made for some proprietary tool, though I'm told a jumbo screwdriver will work.

Last edited by Brocephus; 03-26-20 at 07:53 PM.
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