Help 😆
#1
L-man
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Help 😆
My Co op cty1.3 has attachment points. Can anyone tell me the bolt thread size I would need ?
#2
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Attachment points for what and where on the bike are they?
(My house is painted, what do you think of the color) Andy
(My house is painted, what do you think of the color) Andy
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AndrewRStewart
AndrewRStewart
#4
Really Old Senior Member
Buy a 5mm bolt and see if it fits.
If it doesn't, buy larger/smaller.
If it doesn't, buy larger/smaller.
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#6
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As Bill said. Most all the typical mounting bosses, eyes, are M5 thread (5mm diameter by .8mm per thread). If the bike has a bottle boss set with bolts they are likely M5. Some drop out eyes are M6 (6x1), was popular in the 1980s on Asian made moderate cost bikes.
BTW most fender struts have a strut mounting hole big enough for M6, with a M5 bolt the bolt head can begin to sink into the strut's hole/loop. The strut will never get really tight and tend to loosen. I suggest considering sandwiching the strut loop with a couple of washers. This will allow the bolt to be better tightened and the strut's hole/loop not open up because of the bolt head. Andy
BTW most fender struts have a strut mounting hole big enough for M6, with a M5 bolt the bolt head can begin to sink into the strut's hole/loop. The strut will never get really tight and tend to loosen. I suggest considering sandwiching the strut loop with a couple of washers. This will allow the bolt to be better tightened and the strut's hole/loop not open up because of the bolt head. Andy
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#7
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5mm x 0.8mm is the most common for those mounts. 6mm x 1mm is also possible. Others may be unthreaded to use a bolt that passes all the way through the fitting. Older USA-built bikes may have SAE spec fittings. And older British bikes may have Whitworth spec fittings.
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If the old clunker is old enough, it might be ANSI and not metric.
But I guess someone already said that, but in other terms. <grin>
But I guess someone already said that, but in other terms. <grin>
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Looks like this is an REI branded bike. Call up the REI you bought it from. As you can see from the other posts there are no definite answers from your limited info.
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Ride the bike down to your local hardware store, and ask if you can try an M5 bolt. It'll probably fit.
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Check the eyelets for paint overspray before trying the bolts (yes, M5 is most likely). I've built up several frames with racks and/or fenders and the attachment point have often required clearing before the bolts would thread in.
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5mm x 0.8mm is the most common for those mounts. 6mm x 1mm is also possible. Others may be unthreaded to use a bolt that passes all the way through the fitting. Older USA-built bikes may have SAE spec fittings. And older British bikes may have Whitworth spec fittings.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
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