seat post woes - bolt always snapping

Hmpf... that's no good.

More info, maybe? Does the bolt tend to snap in the middle of rides? Going over rough territory?

Are you particularly... eh... girthy?

What type of post have you been using? Have you experienced this with more than one make of post? Have you experimented with different clamp designs?

What reason do you have to think this is rooted in your fore/aft seat position? Have you tried compensating by using a setback seatpost? For that matter, are you using a frame that fits you properly?

Ok, ok, enough questions. Sounds like a problem with a dramatically clear culprit, given enough info -- you might want to try another shop, for that matter. Let the forum in on a little more info; maybe the answer will reveal itself...

i tried to posts as mentioned, but the designs were similar. the setback seatpost may be just the right thing. i forget the obvious sometimes out of laziness.

i think it's the seat position because one manufacturer suggested that and it made sense logically (ie too much wait on back of seat, not evenly distributed etc.)

not girthy but heavy in some senses 185-190 lbs but 6'3"-6'4".

the bike fit is close to good i just got comfortable with the setup with the seat pushed back and was afraid to fiddle. i just get afraid to mess with my position once i get one that works. maybe i should be more open.

it's happend both over a bump/pothole and yesterday it just went when i sat up and took my hands off, pushing my weight back (of which it all hit the pavement).

thanks for your input.

Quoted post said:

Originally posted by lokstah
Hmpf... that's no good.

More info, maybe? Does the bolt tend to snap in the middle of rides? Going over rough territory?

Are you particularly... eh... girthy?

What type of post have you been using? Have you experienced this with more than one make of post? Have you experimented with different clamp designs?

What reason do you have to think this is rooted in your fore/aft seat position? Have you tried compensating by using a setback seatpost? For that matter, are you using a frame that fits you properly?

Ok, ok, enough questions. Sounds like a problem with a dramatically clear culprit, given enough info -- you might want to try another shop, for that matter. Let the forum in on a little more info; maybe the answer will reveal itself...

Sounds like you must be right. It's a little discouraging; one hopes those bolts are resilient enough to withstand set-back seats over potholes. Provided the bolt is properly torqued (got a torque-wrench?) and the seat installed according to specifications, it's either bum-luck or the inevitable fate of poor-quality hardware.

Welp, either way, your options are limited. Given that you love to ride your seat pushed waaaaay back, there's little sense in not using a seapost with hefty set-back. While you're at it, you may as well get a beefy, trusted one to boot -- maybe a Thompson?

Tighten that bolt carefully, get that seat where you want it, and raise hell with your shop, the post manufacturer, and the diety of your choice if it happens again.

Good luck!

Quoted post said:

Originally posted by gromitsabra
i've had problems for the past few years with the bolts snapping on my seatpost on my roadbike whether i've installed it or the pro shop did. i had two, a carbon seven post and then i with a shimano deore i took from my mountain bike.

i assume the problem is that i position the seat too far back on the rails. bad, but the best fit i know of. so what is the solution? better seatpost? raising saddle and then moving saddle forward? longer cranks, move saddle forward? are there any double bolted seat post clamps?

i'm going to ask at the shop but i wanted to see if others had experience or ideas?

I suggest you try Thomson with set back. They look strange because they are " bent" to th rear. They have 2 bolts.
Make sure to follow the installation instructions carefully, including the torque.

i'll check out thompson. i shop for a seatpost so rarely (only when i buy a new bike) i have no idea what's out there right now.

no torque wrench but that's why i had the shop do it.

thanks

Quoted post said:

Originally posted by lokstah
Sounds like you must be right. It's a little discouraging; one hopes those bolts are resilient enough to withstand set-back seats over potholes. Provided the bolt is properly torqued (got a torque-wrench?) and the seat installed according to specifications, it's either bum-luck or the inevitable fate of poor-quality hardware.

Welp, either way, your options are limited. Given that you love to ride your seat pushed waaaaay back, there's little sense in not using a seapost with hefty set-back. While you're at it, you may as well get a beefy, trusted one to boot -- maybe a Thompson?

Tighten that bolt carefully, get that seat where you want it, and raise hell with your shop, the post manufacturer, and the diety of your choice if it happens again.

Good luck!

Quoted post said:

Originally posted by daveornee
I suggest you try Thomson with set back. They look strange because they are " bent" to th rear. They have 2 bolts.
Make sure to follow the installation instructions carefully, including the torque.

i'm going to look into a thomson. thanks