Chainring bolt tool?
03-09-21, 10:15 AM
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Chainring bolt tool?
Just received a new 42t chain ring. Dropping the ratio slightly from 49/20 to 42/18.
I have a Park Tool chainring spanner to hold the slotted nut at the back. I've only had to use it a couple of times in the past (I don't change chainrings often!) and it was a very poor fit and chewed at the edges of the slot.
I've managed to get it "tight enough for now" but I've also ordered a new set of chainring bolts.
What is the best tool for holding the slotted nut? I normally find Park Tools pretty good but this particular tool is just a piece of pressed steel that is barely an approximate fit.
One that's available in the UK would be ideal!
Thanks.
I have a Park Tool chainring spanner to hold the slotted nut at the back. I've only had to use it a couple of times in the past (I don't change chainrings often!) and it was a very poor fit and chewed at the edges of the slot.
I've managed to get it "tight enough for now" but I've also ordered a new set of chainring bolts.
What is the best tool for holding the slotted nut? I normally find Park Tools pretty good but this particular tool is just a piece of pressed steel that is barely an approximate fit.
One that's available in the UK would be ideal!
Thanks.
03-09-21, 10:32 AM
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I've never had trouble with the Park tool, but maybe try the Shimano TLFC-22.
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03-09-21, 10:53 AM
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I use a chainring bolt tool and hold press it into the slots with a vice grip so it doesn't slip. Eliminates the bolt slipping and rounding out the edge.
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03-10-21, 07:18 AM
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All sorted. Thanks to those who replied.
The old chainring bolts were good few years old and the threads were a bit graunchy even after I cleaned them. They may also have been a tiny tad too long for the new chainring, even though it is for a single speed. The Park Tool spanner was a very poor fit for them.
New chainring bolts arrived today, courtesy of Amazon. The threads were smooth, they were a tiny tad shorter, and the Park Tool fitted the slot perfectly. A triple whammy! They went in easily and nipped up with no trouble at all.
Bike is now on 42/18 which is 63 inches. Before, it was on 49 x 20 which is 66 inches, and I now have the 20t in reserve if I want to do some serious off roading when the mud has dried up a bit.
63 inches is pretty low, but I've found in recent rides that I wanted a "slightly lower gear" more often (headwinds, long gradual climbs) than I needed a "slightly higher gear" (the very occasional hilarious descent).
The old chainring bolts were good few years old and the threads were a bit graunchy even after I cleaned them. They may also have been a tiny tad too long for the new chainring, even though it is for a single speed. The Park Tool spanner was a very poor fit for them.
New chainring bolts arrived today, courtesy of Amazon. The threads were smooth, they were a tiny tad shorter, and the Park Tool fitted the slot perfectly. A triple whammy! They went in easily and nipped up with no trouble at all.
Bike is now on 42/18 which is 63 inches. Before, it was on 49 x 20 which is 66 inches, and I now have the 20t in reserve if I want to do some serious off roading when the mud has dried up a bit.
63 inches is pretty low, but I've found in recent rides that I wanted a "slightly lower gear" more often (headwinds, long gradual climbs) than I needed a "slightly higher gear" (the very occasional hilarious descent).
