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Shimming a triple crankset with washers

Old 01-13-23, 02:04 PM
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Positron400
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Shimming a triple crankset with washers

Hi,

I have a 400 LX crankset with a 110 BCD and i got me a 38 chainring. However, the chainring bolts are too long to properly affix the chainring w/o a second chainring. But I would like to run it (at least for now) as a one-by. Can i just safely shim it with some random washers, given the inside/outside diameters work?

All the best!
P400
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Old 01-13-23, 02:17 PM
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You need to buy the shorter bolts meant specifically for single chain rings.
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Old 01-13-23, 03:19 PM
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Originally Posted by icemilkcoffee View Post
You need to buy the shorter bolts meant specifically for single chain rings.
Bingo!
https://www.amazon.com/RocRide-Singl...NrPXRydWU&th=1
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Old 01-13-23, 03:37 PM
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You could use the correct washers, but the bolts will be easier to find.

Put the other chainring back on.
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Old 01-13-23, 04:03 PM
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As always just get the proper bolts. You can get some Made in 'Murica in fun colors: https://www.wolftoothcomponents.com/...ts-nuts-for-1x
I have used them on one of my fixed gear/single speeds and it is great for that.
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Old 01-13-23, 04:24 PM
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Originally Posted by veganbikes View Post
As always just get the proper bolts. You can get some Made in 'Murica in fun colors: https://www.wolftoothcomponents.com/...ts-nuts-for-1x
I have used them on one of my fixed gear/single speeds and it is great for that.
I would go that route, if I wasn't trying to keep the budget down as much as possible. This is not going to be a blingy build, and I wanna be as not-spendy as i can be
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Old 01-13-23, 04:33 PM
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Originally Posted by Positron400 View Post
I would go that route, if I wasn't trying to keep the budget down as much as possible. This is not going to be a blingy build, and I wanna be as not-spendy as i can be
OK well get some cheaper 1x steel bolts your local shop may have them.
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Old 01-13-23, 04:36 PM
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Originally Posted by veganbikes View Post
OK well get some cheaper 1x steel bolts your local shop may have them.
Come to think of it, i could cut down the bolt and nut, couldnt i?
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Old 01-13-23, 05:57 PM
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Originally Posted by Positron400 View Post
Come to think of it, i could cut down the bolt and nut, couldnt i?
No don't do that. Save those bolts and get the correct ones. Trust me the time it would take to get it right and make sure the threads are good on a fairly important part is not worth the little money you would spend on bolts. It is like 10 bucks for some Problem Solvers single chainring bolts or see if you have an old single speed/fixed gear cranksets and take the bolts from that.
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Old 01-13-23, 06:16 PM
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Originally Posted by Positron400 View Post
Come to think of it, i could cut down the bolt and nut, couldnt i?
I narrowed a set once by grinding both bolt and nut on a bench grinder. It's not worth the time doing considering the small cost of new ones.
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Old 01-13-23, 08:34 PM
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If you have access to other cranksets, check if one of those have boltsets that may work. Different brands of cranksets have different bolt types. Recall back in the 80's when setting up special crank for a hill climb race and going to a single ring crank, the Shimano bolt wouldn't tighten down, but switching to Sugino bolts did.
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Old 01-14-23, 03:13 AM
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Originally Posted by KCT1986 View Post
If you have access to other cranksets, check if one of those have boltsets that may work. Different brands of cranksets have different bolt types. Recall back in the 80's when setting up special crank for a hill climb race and going to a single ring crank, the Shimano bolt wouldn't tighten down, but switching to Sugino bolts did.
Nah, no other cranksets at this point. Will have to see how the chainline works with this one already. Either way, I found some 2 mm x 10.5 mm shims at our local hardware store (8 for 2.60 ) that worked and allowed me to tighthen down the chainring!
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