Attention Brooks owners!!
While getting ready to get back to riding after a rest stop today I noticed the tension bolt for my B17 had fallen out. I think it had fallen out about 200 miles ago too, and the ride home wasn't much different than the ride there either. I looked on the Brooks website for a replacement and didn't find one for the B17, but I did find something that said the tension should be checked every 6 months. Guess I shouldn't have believed all the people that said to not adjust the tension to avoid over tightening it.
So now I need to replace the tension bolt and anything else that may have fallen off too. Does anyone know what the thread and pitch of bolt is? I hope it's not some weird Whitworth thread that's only available in England. What else may have fallen off? |
Originally Posted by no motor?
(Post 20197281)
While getting ready to get back to riding after a rest stop today I noticed the tension bolt for my B17 had fallen out. I think it had fallen out about 200 miles ago too, and the ride home wasn't much different than the ride there either. I looked on the Brooks website for a replacement and didn't find one for the B17, but I did find something that said the tension should be checked every 6 months. Guess I shouldn't have believed all the people that said to not adjust the tension to avoid over tightening it.
So now I need to replace the tension bolt and anything else that may have fallen off too. Does anyone know what the thread and pitch of bolt is? I hope it's not some weird Whitworth thread that's only available in England. What else may have fallen off? |
Thanks!
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Originally Posted by no motor?
(Post 20197281)
Guess I shouldn't have believed all the people that said to not adjust the tension to avoid over tightening it.
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Originally Posted by lostarchitect
(Post 20197370)
"Don't fiddle with it unnecessarily" =/= "never look at it".
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This is your tension bolt:
https://www.niagaracycle.com/categor...-bmp173-chrome If your saddle has stretched out you may want a longer tension bolt: https://www.niagaracycle.com/categor...-70mm-with-nut You may also have lost the shackle clip: https://www.niagaracycle.com/categor...17-narrow-flye But it may be very difficult to get the tension bolt into the saddle without damaging the leather. The steel frame is rather springy, so what you need to do is attach the shackle clip and bolt, then compress the frame (push the front toward the back) until you can slip the end of the bolt into the hole in the nose piece. It is really hard to do. Really hard. Don't try to stretch the leather; it will tear before it stretches. If you can't get the tension bolt in by compressing the frame, you'll have to remove all six rivets from the cantle plate, put the frame together with the rivets out, then re-rivet. You don't have to use Brooks rivets; 8-6 or 7-6 brake lining rivets will work. |
There is US distributor , several for Brooks , My LBS got 2 complete frames , replacing them, keeping the leather.
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Originally Posted by no motor?
(Post 20197386)
Or just get one that needs less maintenance and can handle getting wet......
Their tension simply changes too much with changes in humidity. Also I found the workmanship/materials to be shoddy with loose rivets, bolts falling out, defects in leather, new frame rails breaking, etc. |
Originally Posted by rhm
(Post 20198098)
This is your tension bolt:
https://www.niagaracycle.com/categor...-bmp173-chrome If your saddle has stretched out you may want a longer tension bolt: https://www.niagaracycle.com/categor...-70mm-with-nut You may also have lost the shackle clip: https://www.niagaracycle.com/categor...17-narrow-flye But it may be very difficult to get the tension bolt into the saddle without damaging the leather. The steel frame is rather springy, so what you need to do is attach the shackle clip and bolt, then compress the frame (push the front toward the back) until you can slip the end of the bolt into the hole in the nose piece. It is really hard to do. Really hard. Don't try to stretch the leather; it will tear before it stretches. If you can't get the tension bolt in by compressing the frame, you'll have to remove all six rivets from the cantle plate, put the frame together with the rivets out, then re-rivet. You don't have to use Brooks rivets; 8-6 or 7-6 brake lining rivets will work. I got my girlfriend a Serfas saddle at REI that she just loves, that may be my best choice now. |
Originally Posted by no motor?
(Post 20199192)
That sound like more trouble than it's worth, especially with the prices Brooks lists for the hardware.
I got my girlfriend a Serfas saddle at REI that she just loves, that may be my best choice now. If you're not going to fix it, though, I hope you'll pass it on to someone who will. :innocent: |
Originally Posted by no motor?
(Post 20199192)
I got my girlfriend a Serfas saddle at REI that she just loves, that may be my best choice now.
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Originally Posted by rhm
(Post 20199216)
Yeah, fair enough. Of course it also depends on the condition of the leather.
If you're not going to fix it, though, I hope you'll pass it on to someone who will. :innocent: |
Originally Posted by RubeRad
(Post 20199239)
Just because her butt loves that saddle, and (presumably) you love her butt, doesn't mean your butt will love her saddle. Transitivity does not necessarily apply here.
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Originally Posted by no motor?
(Post 20199480)
I'm going to see how easy it is to bend Friday. I've been noticing how my bike seemed to flex when cornering after I put different tires on it, and I think that must be when the part fell off. If it's that easy to flex I'll try and fix it but the leather has to come off then it's time for something better.
I'll get back to you with details tomorrow. You'll definitely need the shackle clip, though; I can't think of a way to get by without that. |
Here are a few measurements taken from Brooks bits in my parts bin. To make sense of these, you may need to refer to the photos of the parts I linked previously.
The tension bolt that comes on a B.17 is 64mm long; the one on a Professional is 70 mm long. The difference is in the plain (not threaded) section at the front; about 7 and 12 mm respectively. The bolts are 8 mm thick, except for an 11.5 mm band at the head end. The tip is a rounded bit, 8 mm wide, 3 mm long. I'm estimating 20 tpi. The nut is 9.5 mm long, half of it hexagonal (13.3 mm), half round (10.5 mm tapering to 10.0 mm). The hole in the shackle clip is 10.8 mm. If you want to make yourself a replacement tension bolt, anything with a width in the area of 8-9 mm should work. I would file the head to shape while spinning it in an electric drill. You'll also need to file half of the nut round. The rounded section of the nut is important: it protects the threads from the shackle clip. The advantage of a home made tension bolt would be that since it doesn't have the non-threaded section at the head, it will be easier to mount in your saddle. You will need the shackle clip, though. If you lost yours along with the bolt, you will need to replace it. I can't think of any suitable home made substitute. |
Thanks, I was thinking of heading to the hardware store and trying to find a longer bolt and snug it down with a pair of nuts. Thanks for the measurements too. I think I lost the shackle clip too, this could work after a bunch of mcguyvering. Good thing I'm used to that.
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Well that was interesting. I took the saddle off to get a better look at things and found that the tension bolt had become loose enough to allow the leather to be flop around, but nothing had fallen off. I tightened things up again using the official Brooks wrench I got when I got the saddle and now need to no how much is enough but too much tension.
I did try to see how much force it would take to get the frame reals to move and those parts aren't going to move without a lot of force.I'm glad I didn't need to do that!! |
Cool.
It needs enough tension that it doesn't rattle. When you aren't sitting on it, that's almost no tension at all. |
I had the same problem and fixed it with a hex-head carriage bolt and matching nut. One side benefit is that it is easy to assemble and tension can be adjusted much more easily.
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Originally Posted by rhm
(Post 20203783)
Cool.
It needs enough tension that it doesn't rattle. When you aren't sitting on it, that's almost no tension at all. It was kind of hard to see the underneath of the saddle while it was on the bike, and once I took it off I was able to see the parts were just loose and not lost. Thanks again for the help. |
Cambium owners complained about The Rivet-bolts falling out
and read one where the rubber failed, tore, was the lighter gum , not black type. |
In those cases, did Brooks step up and repair or replace?
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I really like a Brooks but it turns out I like a lot of saddles and most of them cost less and, while I have found Brooks to stand up fantastic to neglect in our hellaciously rainy environment, I still feel guilty about not being a helicopter parent to them (even though there has definitely been no ill effect). So I have debrooksed all my bikes except the Pugsley with the sprung 'conquest'.
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Originally Posted by HardyWeinberg
(Post 20205854)
I really like a Brooks but it turns out I like a lot of saddles and most of them cost less and, while I have found Brooks to stand up fantastic to neglect in our hellaciously rainy environment, I still feel guilty about not being a helicopter parent to them (even though there has definitely been no ill effect). So I have debrooksed all my bikes except the Pugsley with the sprung 'conquest'.
My brother's Brooks, was procured on a used bike he bought in the 70s. He rode it on numerous Ragbrais, a ride from Iowa to Oklahoma, then on a ride across Oklahoma, has never done anything to it, and I do me has done nothing to it, and it is still on that same bike and is fine. I guess if that is your definition of "helicopter parent," a Brooks, then we are in complete agreement. |
1 Attachment(s)
Originally Posted by rhm
(Post 20200300)
Here are a few measurements taken from Brooks bits in my parts bin. To make sense of these, you may need to refer to the photos of the parts I linked previously.
The tension bolt that comes on a B.17 is 64mm long; the one on a Professional is 70 mm long. The difference is in the plain (not threaded) section at the front; about 7 and 12 mm respectively. The bolts are 8 mm thick, except for an 11.5 mm band at the head end. The tip is a rounded bit, 8 mm wide, 3 mm long. I'm estimating 20 tpi. The nut is 9.5 mm long, half of it hexagonal (13.3 mm), half round (10.5 mm tapering to 10.0 mm). The hole in the shackle clip is 10.8 mm. If you want to make yourself a replacement tension bolt, anything with a width in the area of 8-9 mm should work. I would file the head to shape while spinning it in an electric drill. You'll also need to file half of the nut round. The rounded section of the nut is important: it protects the threads from the shackle clip. The advantage of a home made tension bolt would be that since it doesn't have the non-threaded section at the head, it will be easier to mount in your saddle. You will need the shackle clip, though. If you lost yours along with the bolt, you will need to replace it. I can't think of any suitable home made substitute. |
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