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Pootling along in the woods on Saturday there was load crack and my saddle tipped me back onto the back wheel. Luckily I had a crud guard on to stop my nuts going into the gap between the wheel and the frame, with the potential for a 'scrotal degloving'.
The post is an on-one twelfty so has two 4mm bolts. The front one had gone with no warning.
Is this common?
Anyone used the i-beam system?
first breakage Ive heard of. Same system as Thomson, give or take.
Im sure O-O will sort you out if you get in touch with them.
i had an on-one twelfty on my scandal when i got it. it lasted about 4 months and then bent after a not-that-hard sketchy impact.
replaced it with a thomson, fit and forget reassurance ever since.
You wear gloves on your sack?!! 😯
(s'okay, I do actually know what degloving is)
tip: wear some shorts...
I've broken a couple of bolts at the top of the seat post. Corrosion combined with a heavy landings.
Nearly gave myself a CroMo enema.
do you remember the magura brake braces? we once had to bend one of those remove one of those from a frame so my mate could remove extract himself...
scrotal degloving isnt nice. Happened to me once with a brand new DH tire on and V brakes. It still hurts when its cold!
ooh nasty...
I had a bolt snap on a twelfty...a friend was a bit heavy handed whilst changing my saddle for his!
I found some other guy on here that had done the same and he ordered a couple of extra bolts to send me.
It was. After it had happened I hobbled off into the woods stuck my hand down took it out and it was covered in blood! 😯
I've done it on bontrager, race face, kore and no-name posts - it's my most common part breakage. (all of my breaks were with one bolt posts)
A friend of mine is a casualty doctor and had to deal with a 'degloving', the guy went over the bars, the stem caught him just below the belly button and ripped down from there, he had his own personal loincloth made of his own skin... not nice.
She also had to deal with a woman once that has lost her vibrator up her bum, she let go of it and it worked its way up... and up, and up some more. they had to wait until the batteries ran out before they could operate.
Great stories to hear over dinner!
[i]Great stories to hear over dinner! [/i]
A&E nurses are fantastic story tellers! 🙂
I've never had a Thomson design one go on me - possibly bolts overtight? But it makes me want to remove and replace the ones i have tonight (fortunately have a local bolt shop near me so can get replacements for pennies)
I have done a few of the single bolt sort though. I think it's an inherent design flaw (for MTB'ing at least) Any off centre force on the saddle - nose or rear is trying to open the bolt up and after a while fatigue will do the trick.
The best I've seen therefore are like the old RF XY, or their new design whre the bolt isn't part of the structure, just holds the structure together if you see what I mean.
My rear twelfty bolt snapped a mile or so into the first lap of a race in January. I did the rest of the lap sans saddle but that was the end of the race for me, too demanding on the old calf muscles.
Degloved me nads falling down a quarry on the South Downs back in 1988 and badly buckled my back wheel in the process. (Had a long bow-legged walk back home with the bike on my shoulder and blood accumulating in my boxershorts 🙁 (I Didn't dare wear lycra in them days).
Anyone know if on-one sell spare twelfty bolts? I've lost one of the little funny shaped brass washers as well.