20" folding bike rear wheel

[SmellyTofu]

I bought a folding bike as a backup wheels to get home and the upgraditus bug has bitten. I have 2 Tiagra groupo I've pulled out of old low k bikes but my limiting bit I need to swap the groupset over is the rear wheels as it's a 7 speed. I know I can keep riding on the 7 speed but there's no point wasting good bits that's not worth anything but I know are functionally very reliable.

Does anyone know where I can buy 8-10sp 20" rear wheel? Every 20" I've seen in the market are all for BMX.

[find_bruce]

Which 20" are you after - ie bead seat diameter of 419mm (20 x 1 3/4) or 451mm (20 x 1 1/8; 20 x 1 1/4; 20 x 1 3/8) ?

SJS have an option for 451mm BSD. Not cheap though.

Might be cheaper to build the hub into your rim

[SmellyTofu]

It's the 406mm variant... might be cheaper to buy a cheap folder and part it out... or find an antidote for the upgraditus bug

[find_bruce]

of course it is. Let me know if you find the antidote to upgradeitis.

Still if it is upgrades you are after, how about a 3 spoke carbon ?

[Duck!]

Might be cheaper to build the hub into your rim

Almost certainly.

[OldBloke]

Velogear lists a number of 20in rims (http://www.velogear.com.au/bike-parts/b ... -rims.html" onclick="window.open(this.href);return false;) so you could build your own wheel. That might cure upgraditus.
If I'm wrong blame Tapatalk.

[rifraf]

I loved my custom 406 wheels I built up for my Moulton whilst I had it.
I used a Son dynamo hub for the front and a Sram Dual Drive for the rear.
I got the firm wheelbuilder.com in the States to custom fit CX-Ray spokes and Velocity Aeroheat rims (406).
Unfortunately in my accommodation I can only have one bike and as my main cycling interest is touring, the Moulton, which couldn't carry enough water for extended trips, had to go and in its place a Surly Ogre.
The Dualdrive is a great little unit with a cassette on the outside and three speed IHG inside the hub. I used only a 7 speed cassette, but they can handle up to 10 speed I believe.
Let me know if you need any more info.

Just spotted a link:
https://www.sram.com/sram/urban/family/dd3" onclick="window.open(this.href);return false;
For a 7 speed cassette you need to buy a 4.5mm (from memory) spacer.

http://www.amazon.com/SRAM-36H-Dual-Dri ... B00DPVC8YW" onclick="window.open(this.href);return false;

[Testing386]

I have a surplus wheel set that came with my Bike Friday...

Pantour suspension front hub laced radially
Ultegra rear hub
Velocity Razor 32 hole rims
Stainless steel spokes

Located in Sydney...