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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Shims for an 84 Quadangle
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Author Topic: Shims for an 84 Quadangle  (Read 567 times)

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Offline southern andy

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Shims for an 84 Quadangle
« on: August 18, 2008, 11:59 AM »
A bit of info please chaps........... Are there different shim sizes as i have a Uni Pro and it is to be fitted to an 1984 SE Quadangle. The problem is the seatpost doesn't fit the frame like i was told. So in preparation for this i acquired a shim from an Aero Reflex to sit inside the Quadangle.

Sadly it still isn't enough and the clamp just doesn't tighten up on the post.


So..... What size do i need or what can i do about it, i was hoping to ride the bike so packing out with electrical tape isn't an option. ::)

Many thanks in advance

Andy
One build a year, the only way to get it right. No rushing involved.

HEYWOOD BMX

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Re: Shims for an 84 Quadangle
« Reply #1 on: August 18, 2008, 12:02 PM »
 :) Don`t know about size,but there are plenty of shims on the market. 

Offline southern andy

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Re: Shims for an 84 Quadangle
« Reply #2 on: August 18, 2008, 12:09 PM »
Hmmmm, the seat post James is 20mm and the space available in the frame is 23mm, when i fit the shim i have it still has 2mm of play in it. I'm assuming that even with my small pea brain there must be thicker shims out there.
« Last Edit: August 18, 2008, 12:12 PM by Southern Andy »
One build a year, the only way to get it right. No rushing involved.

HEYWOOD BMX

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Re: Shims for an 84 Quadangle
« Reply #3 on: August 18, 2008, 12:16 PM »
http://www.chainreactioncycles.com/Categories.aspx?CategoryID=215

Seems to be loads,but nothing smaller than a 25mm.I`ll have a nosey and see if I can find something suitable.Try asking in the wanted section,prob your best bet.


                            James

fouronethreeoh!

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Re: Shims for an 84 Quadangle
« Reply #4 on: August 18, 2008, 07:15 PM »
Old school seat posts were generally 7/8 inch, 22.2mm.
Except aluminium rippers/race incs etc that were 13/16 inch, 20mm.
Due to the thicker wall tubing of alu.
If the Uni post is 20mm, and its a uni shim this should take it to 22 mm.
There is quite often some play between post and frame until it gets clamped up.

Offline southern andy

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Re: Shims for an 84 Quadangle
« Reply #5 on: August 18, 2008, 07:21 PM »
Fingers crossed i may be sorted on this now, a very helpful Rad Member is sending me a thicker shim, he seems to think it may even be a Uni one.

Basically i have been using a 22.2mm post on the bike but the Uni Pro's post is thinner than that, bit weird as my other Uni Pro fits my other bike without a shim, i assume they made two different size posts.
« Last Edit: August 18, 2008, 07:25 PM by Southern Andy »
One build a year, the only way to get it right. No rushing involved.

Offline QUADROPHENIA

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Re: Shims for an 84 Quadangle
« Reply #6 on: August 18, 2008, 07:24 PM »


wedge a screwdriver down the side

Offline southern andy

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Re: Shims for an 84 Quadangle
« Reply #7 on: August 18, 2008, 07:28 PM »
Wish i'd thought of that earlier.  :)
One build a year, the only way to get it right. No rushing involved.

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Shims for an 84 Quadangle
 

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