Thomson post slips even with tacx
Moderator: robbosmans
May be a silly question but are you 100% sure it's the right size post? Should be 31.6mm
Is the post/inside of the seat tube worn at all?
How much do you weigh?
A quick/easy temporary fix would be to wrap the inserted end of the post in a thin layer of electrical tape.
Is the post/inside of the seat tube worn at all?
How much do you weigh?
A quick/easy temporary fix would be to wrap the inserted end of the post in a thin layer of electrical tape.
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alexh wrote:May be a silly question but are you 100% sure it's the right size post? Should be 31.6mm
Is the post/inside of the seat tube worn at all?
How much do you weigh?
A quick/easy temporary fix would be to wrap the inserted end of the post in a thin layer of electrical tape.
Just measured it with digital calipers. The post measure 31.6 millimeters so probably within tolerance. The post isn't worn and the frame is new.
Ufgators wrote:What do I look for in defective clamp?
Shearing of the bolt/nut, or the clamp may be slightly too large for the frame and therefore unable to provide suitable clamping force.
Last edited by Devon on Thu Jun 13, 2013 3:30 pm, edited 1 time in total.
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Grease between the clamp and frame. Grease bolt threads fully, and under the bolt head. As before, Tacx paste on post to frame.
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I have always found that the Masterpiece posts are marginally smaller than the normal posts from Thomson. I wonder if the extra machining takes a small amount from the overall diameter. I know it is not the principle of WW, but if the torque is correct and the clamp ok, I would try another Masterpiece to see if it is a case of upper-lower tolerances, and then think about a non-Masterpiece. The weight savings are modest compared to having a robust seat fitting.
If the Masterpiece is not robust, nothing is robust
i had a similar problem with my ax europa post
6Nm, maximum rated torque - wrench checked against calibrated one at work
clamping bolt/nut threads clean and lubed
inside of seat tube degreased
the post is a tight fit
tacx paste didn't solve it - pink paste
finish line paste didn't solve it - white paste with gritty feel
but a mix of the two pastes did, at 6Nm the post no longer slips, been ok with this method for 3 years now
have to reapply paste mix any time i remove/refit the post, i.e. after boxing the bike for travel, otherwise it will slip without fail
6Nm, maximum rated torque - wrench checked against calibrated one at work
clamping bolt/nut threads clean and lubed
inside of seat tube degreased
the post is a tight fit
tacx paste didn't solve it - pink paste
finish line paste didn't solve it - white paste with gritty feel
but a mix of the two pastes did, at 6Nm the post no longer slips, been ok with this method for 3 years now
have to reapply paste mix any time i remove/refit the post, i.e. after boxing the bike for travel, otherwise it will slip without fail
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Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
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