I know there is only a minority of Trials riders that use 24" wheels but I wanted to get a decent list off all the rims and tyres available as obviously there is only a relatively small choice compared to 26".
Rims:
Mavic-XY rim 31mm wide, 490gm, 36h, Good luck finding one,
Arrow Racing-DHX, 749 gr, 37mm wide, small braking surface.
Arrow Racing-XCL, 449gr, 27mm wide, 25.4 braking surface.
Arrow Racing-FRX, 540gr, 27mm wide, think they're disc only.
Halos- (any kind) Really heavy, strong rim, SAS, Freedom and Combat. AVOID
Tioga-Factory DH, 545gr, eyeletted, 35mm (see Rich 4130's post about them)
Sun-Rhyno Lite XL-500gr, welded and eyeletted, good rim+
Single Track rim-strong, sketchy on details.+ Sun Double Wide-ugly, 47mm wide, Very Heavy+ Sun Mammoth, again heavy and not that strong!
DMR-Deevee rim, disc or non disc versions available, 32mm wide, strong, 640gr, pinned, eyeletted.
Atomlab-Trailpimp- 810gr!, 34mm, 32 or 36h, 32mm braking surface, black
Atomlab-GI Street; 787gr, 32mm, 36h, 24.5mm braking surface, black
Atomlab-GI Dirt; 620gr, 32 or 36h, gun metal grey,
Atomlab-Trailpimp DHR; 650gr, 32 or 36h, 29mm braking surface, black
Alex DX32, Nice pinned rim, used for 24seven wheelsets.
Planet X-BMF, wide rim, very strong, pinned.
Tyres:
Arrow Racing-Launch,24 x 2.35 850gm,
Arrow Racing-Blitz, 24 x 2.35 750gm 60tpi mediumwall
Halo-Choir Boy/Choir Boy Lite: 2.3 width, good rear tyre, 940gr, 17.99
DMR-Moto: Dirt/Street tyre, weak sidewalls, better ran at high pressures. 2.2 width,980gr (ish)
DMR Moto Digger-Square profile, 2.3 width, quite light 800gr, 14.99
Tioga- New Blue Dragon, 4X tyre although looks promising, 2.1, 690gr
Tioga-Comp 3; 2.1, 720gr.
Tioga-Comp X tyre, 2.1, 66tpi, 14.99,
Primo Dirt Monster-2.2, similar to Moto, BMX tradeoff tyre.
Maxxis-High Roller, 2.5/ 2.70, sounds like a good rear tyre choice, 22-24.99
Maxxis-Maxx Daddy/Holy Roller, 1.85, 640 gr, cheap.
IRC Kujo Tyre,2.35/ 3.0, heavy, strong sidewalls.
Kenda Blue Groove Stick-E 24x2.50 Wire 1140g £26.99
Nokian Gazzaloddi, 2.6/3.0, 1400gr, 65tpi, nice square profile tyre, 33.99!
Specialized-Roller Pro 2.5, quite light for size, v grippy
Intense: Downhill FRO Sticky Rubber, 2.35. (FRO=For Race Only so don't expect them to last)
Schwalbe-Al Mighty, 2.35, light, Kris Leeson likes these,
Tubes:
Nokian DH, thick as Fcuk, 350gr, about 6 quid.
Raleigh/taiwanese cheap, light, does the job, cheap.
Or you can use BMX tubes and just stretch them when putting the tube over the rim; worked for my front 26" wheel!
Spokes:
Billys- Halo spokes, 25p each
Custom Riders do loads of spokes.
Thanks to Rich4130 and everyone else for their help! Any other options please list them.
Cheers,
Tom