Loose seatpost - Spa Aubisque frameset

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531colin
Posts: 12468
Joined: 4 Dec 2009, 6:56pm
Location: North Yorkshire

Re: Loose seatpost - Spa Aubisque frameset

Postby 531colin » 25 Aug 2019, 5:06pm

I have to take the seatpost out to get the bike in the car, and last time I had my "slippy seatpost bike" out I found that this thing https://www.chainreactioncycles.com/dmr-hinged-clamp/rp-prod745 hadn't completely stopped the slipping.
So now I have Araldited it in position. (I think I can warm it up if I need to get it off?)
This is also a bike that I ride in either boots or shoes, and I am driven to change the saddle height for different footwear. (Princess and pea syndrome). So I made a "ring" out of sheet Ali. to go raise the seatpost for wearing boots. (2 different sized holesaws and a hand file; I guess something could be turned up?)
Anyway, to get to the point....I don't much care what stuff looks like, as long as it works. Somebody who is concerned about looks could araldite a similar ring onto the seatpost?...pretty unobtrusive.

bgnukem
Posts: 176
Joined: 20 Dec 2010, 5:21pm

Re: Loose seatpost - Spa Aubisque frameset

Postby bgnukem » 28 Aug 2019, 4:03pm

Will be collecting the frameset from my friend in Yorkshire this weekend, after he had a friend of his machine down a 27.4mm seatpost to hopefully fit the frame.

However, I'd be interested to know if there are any external clamps out there which could be fitted to a 27.2-ish seatpost to stop the seatpost slipping down in the frame. The clamp Colin used is too large.

A year after buying the frameset I've still not ridden the bl**dy bike and this whole issue (and Spa's unwillingness to acknowledge it) has put me right off Spa Cycles I'm afraid.

PH
Posts: 7403
Joined: 21 Jan 2007, 12:31am
Location: Derby
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Re: Loose seatpost - Spa Aubisque frameset

Postby PH » 28 Aug 2019, 5:36pm

bgnukem wrote:A year after buying the frameset I've still not ridden the bl**dy bike and this whole issue (and Spa's unwillingness to acknowledge it) has put me right off Spa Cycles I'm afraid.

What was the result of this?
bgnukem wrote:I agreed to buy one of the seat posts they usually sell with the frame but am not particularly confident it won't drop

bgnukem
Posts: 176
Joined: 20 Dec 2010, 5:21pm

Re: Loose seatpost - Spa Aubisque frameset

Postby bgnukem » 29 Aug 2019, 3:57pm

Result was the seatpost the shop uses was still loose enough to rock in the seat tube, although around 0.1mm larger in diameter than the original 'post I bought to build the bike.

So, I left the frame with my mate and supplied two 27.4mm seatposts, which would not fit in the frame, which he had a friend machine down to fit. One was written off in the process by being machined too small.

I plan to get the frame back this weekend and rebuild the bike when I have time and try it with the machined seatpost.

Spa did not offer to replace the frameset and John appeared to think the problem was my seatpost (size 27.2mm). I measured my seatpost at around 27.08mm and other nominal 27.2 posts (including the one Spa sold me) at around around 27.14 - 27.18mm but they were loose also, not just in my frameset but in other Aubisque steel frames/bikes in the shop at the time (June) when I called in.

PH
Posts: 7403
Joined: 21 Jan 2007, 12:31am
Location: Derby
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Re: Loose seatpost - Spa Aubisque frameset

Postby PH » 29 Aug 2019, 4:02pm

bgnukem wrote:Result was the seatpost the shop uses was still loose enough to rock in the seat tube, although around 0.1mm larger in diameter than the original 'post I bought to build the bike.

So, I left the frame with my mate and supplied two 27.4mm seatposts, which would not fit in the frame, which he had a friend machine down to fit. One was written off in the process by being machined too small.

I plan to get the frame back this weekend and rebuild the bike when I have time and try it with the machined seatpost.

Spa did not offer to replace the frameset and John appeared to think the problem was my seatpost (size 27.2mm). I measured my seatpost at around 27.08mm and other nominal 27.2 posts (including the one Spa sold me) at around around 27.14 - 27.18mm but they were loose also, not just in my frameset but in other Aubisque steel frames/bikes in the shop at the time (June) when I called in.

OK, but maybe before posting that Spa haven't dealt with it you might have tried their solution, I don't know why you didn't, I can't see what you had to lose.

bgnukem
Posts: 176
Joined: 20 Dec 2010, 5:21pm

Re: Loose seatpost - Spa Aubisque frameset

Postby bgnukem » 2 Sep 2019, 7:08pm

Bike isn't built up yet. Had to leave frame/forks in York to get the seatpost machined to fit.

When it's built I'll try both seat posts. However, from past experience it's been an issue for me of seatposts slipping even when they're not as loose as the seatpost Spa sold me.

cromo
Posts: 58
Joined: 3 Aug 2009, 9:10am

Re: Loose seatpost - Spa Aubisque frameset

Postby cromo » 4 Sep 2019, 4:14pm

To solve slipping seatposts I have used an extra seatpost clamp fitted around the seatpost. The extra seatpost clamp is fitted with a shim to make it the correct diameter so that it clamps securely. I used a seatpost shim of an appropriate thickness cut to the correct length.
This does work! SJS cycles is a good source for parts.

bgnukem
Posts: 176
Joined: 20 Dec 2010, 5:21pm

Re: Loose seatpost - Spa Aubisque frameset

Postby bgnukem » 6 Sep 2019, 11:40am

Cheers. Might end up doing that if the machined seat post slips in the frame!