Carbon Base and Thomson Seatpost - Page 2

412 · 2007-11-20, 06:50 AM

I'll be following this thread with much interest...

Wouldn't a "tilted" (see picture) 4bolt post allow you to get a horizontal rear portion using the KH Freeride. And if so are there any that are ones longer than 250mm as I think that is what my KH 24 came with and it's just barely long enough with a rail adapter.

TrialsUni · 2007-11-20, 02:53 PM

Zack Baldwin and Ryan Atkins once rode with carbon fibre bases attached to thompson posts before the wallis base came around.

I don't their exact methodology in constructing a means for the two to be attached, or how effective their results were. Zack rode his unicycle that way in Defect, and there are just a couple tiny shots of Ryan on the Semper alum. frame where he rode with this seat arrangement. So, I don't know what the weaknesses were, if any. This was around 2004/5.

Maybe you could ask Ryan about it, or maybe someone will read this thread and post what they know.

Here's a picture of what it looked like on Zack's old uni. You can see that he constructed a carbon fibre piece for it to work on the outside, but I don't know what he did to hold everything in place on the flipside. I jacked this from unicyclejester.com:

gerblefranklin · 2007-11-20, 07:12 PM

Zack, Ryan, and I all did this. The way I did mine was I took the bottom plate of the thomson rail holder and sanded it until it fit the contours of the cf base. Then I drilled for the two bolt holes. I sandwiched two pieces of thick innertube between the plate and the base to keep it from scratching the cf. I was never particularly impressed by the results, but it did work. From an engineering perspective, i think the rail adapter is much stronger for a host of reasons.

Zack got that second piece of cf from a cf base he snapped a while back.

I actually do have an extra de-rail base right now (miyata foam, duct tape cover, kinport handle) since I'm only riding one unicycle, but damned if I'm ever gonna part with it. Right now it's hanging on the wall in my dorm room as a piece of art. It's very classy. When the day comes that I decide to rebuild my trials uni, I'll have that seatbase ready.

2007-11-20, 02:53 PM	#17
TrialsUni urban trials with a street flare Join Date: Sep 2004 Location: 'A-drain' Michigan Age: 27 Posts: 497	Zack Baldwin and Ryan Atkins once rode with carbon fibre bases attached to thompson posts before the wallis base came around. I don't their exact methodology in constructing a means for the two to be attached, or how effective their results were. Zack rode his unicycle that way in Defect, and there are just a couple tiny shots of Ryan on the Semper alum. frame where he rode with this seat arrangement. So, I don't know what the weaknesses were, if any. This was around 2004/5. Maybe you could ask Ryan about it, or maybe someone will read this thread and post what they know. Here's a picture of what it looked like on Zack's old uni. You can see that he constructed a carbon fibre piece for it to work on the outside, but I don't know what he did to hold everything in place on the flipside. I jacked this from unicyclejester.com: Attached Images

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2007-11-20, 06:50 AM	#16
412 Cold blue steel and sweet fire Join Date: Feb 2007 Location: Gothenburg, Sweden Posts: 112	I'll be following this thread with much interest... Wouldn't a "tilted" (see picture) 4bolt post allow you to get a horizontal rear portion using the KH Freeride. And if so are there any that are ones longer than 250mm as I think that is what my KH 24 came with and it's just barely long enough with a rail adapter.

2007-11-20, 07:12 PM	#18
gerblefranklin Registered User Join Date: Aug 2003 Posts: 1,865	Zack, Ryan, and I all did this. The way I did mine was I took the bottom plate of the thomson rail holder and sanded it until it fit the contours of the cf base. Then I drilled for the two bolt holes. I sandwiched two pieces of thick innertube between the plate and the base to keep it from scratching the cf. I was never particularly impressed by the results, but it did work. From an engineering perspective, i think the rail adapter is much stronger for a host of reasons. Zack got that second piece of cf from a cf base he snapped a while back. I actually do have an extra de-rail base right now (miyata foam, duct tape cover, kinport handle) since I'm only riding one unicycle, but damned if I'm ever gonna part with it. Right now it's hanging on the wall in my dorm room as a piece of art. It's very classy. When the day comes that I decide to rebuild my trials uni, I'll have that seatbase ready.

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