Ok, after further research I realised that I might not be able to fit a 700c (28inch Wheel) on the rear of the bike. The front end is not an issue as i have seen 700c and 650 (27inch Wheel) 1inch threadless forks available to buy online. I might have to resort to the 650 size rim though, i can’t see that being bigger than a 26inch wheel with a 2.4 downhill tyre fitted to it, after all the the tyre on the 650 rim will be a road slick. There is only one way to find out and that is to take the frame to a shop and see if they will kindly try and fit a wheel on the back before buying. I’ll be able to do some rough measurements when the frame arrives, hopefully tomorrow!
Assuming i can fit either 700c or 650 sized wheels on the bike i then need to look at getting custom built wheels. The front wheel will take a standard road 100mm width hub/axle and the rear needs a fixed gear 135mm width hub/axle as the rear track end is still standard mountain bike width. I still need to do a little more research into rim widths. I don’t want ultra thin as they will probably buckle with me not being the lightest chap. I added a link to wheel sizing chart in the links section, its quite an interesting read. I didn’t realise there were some many standards.
After writing all that I found these threads on a forum. Looks like might be in luck after all?
“A 700c or 650c rim with a road tire (30c +/- not much) is about the same diameter as a 26″ with a 1.5/1.75 slick, however the rim size will not be compatible for braking purposes. So unless you run disc brakes (or some form of hub brake) you will have to figure out some way to stop.”
“An mtb frame can run 700 wheels with 700 x 32 tyres.”
“Haven’t tried it with Orange forks, but if you fit 700c wheels you’ll probably have to use road brakes; if you use 650c wheels you’ll need to have very adjustable V-brakes.”
