Seat Post clamp

[goo_mason]

After removing my seatpost to clear some grit that was causing it to creak, I overtightened the clamp bolt and it sheared. I just so happened to have a spare clamp, but no matter how tight I dare get it, the seatpost slips down half-an-inch over a 30 minute ride. I'd just swap the bolt over and use the old clamp again, but it's a different size.

Can anyone recommend a good 31.8 seatpost clamp that will avoid any slippage? I've seen a chunky Surly Constrictor on Wiggle that sounds the ticket - anyone use & recommend that?

 

[Deleted member 23692]

I had the same problem and ended up with a Salsa Flip lock - it's not the cheapest but it grips like a goodun. If you're not after a QR on then the Lip lock is the hex bolt version.

flip - http://www.evanscycles.com/products/salsa/flip-lock-seat-clamp-ec005381
lip - http://www.evanscycles.com/products/salsa/lip-lock-seat-clamp-ec005382

 

[ushills]

You shouldn't need it over tight to grip most suggest 5Nm of torque, try some carbon fibre paste as this will provide some grip and remove the need to over tighten.

http://www.wiggle.co.uk/finish-line-fiber-grip-carbon-fibre-assembly-gel-50ml/

 

[goo_mason]

You shouldn't need it over tight to grip most suggest 5Nm of torque, try some carbon fibre paste as this will provide some grip and remove the need to over tighten.

http://www.wiggle.co.uk/finish-line-fiber-grip-carbon-fibre-assembly-gel-50ml/

Is it suitable for non-carbon frames & seatposts though?

 

[goo_mason]

You shouldn't need it over tight to grip most suggest 5Nm of torque, try some carbon fibre paste as this will provide some grip and remove the need to over tighten.

http://www.wiggle.co.uk/finish-line-fiber-grip-carbon-fibre-assembly-gel-50ml/

Thanks - none of them match the size I need (31.8mm) though :-(

 

[ushills]

I use it on my aluminum frames and it's fine.

 

[Deleted member 23692]

Thanks - none of them match the size I need (31.8mm) though :-(

32mm will be fine - Salsa spec them by the size off the hole in the clamp rather than the size of the tube they fit. You need a bit of clearance for them. The 35mm clamp is a perfect fit on my 34.9mm seat tube.

I tried the carbon assembly paste first. It was a waste of money - my the post is a close fit in the tube so when I slide the post down it 'squeegeed' all the gritty bits up the post and off the contact surface.