More sucess
Well..been at it again
Pair of TCKs to fit to the PD. Had a well worn Tourance on front and near new on back.
Front poped off in no time, and new tire on equally quickly (well, 20 mins each ignoring dissassembly which is good enough for me).
I think the 21" is very tricky to get beaded - it's just too narrow. Could I ****ers get it seated even with some nice lubing, bouncing etc. Didn't try a strap as to be honest I couldn't see how a strap could compress a new tire enough and I knew I'd had success with CO2 before - but I wil try at some point. Back to the ickle CO2 cartridge - and as it worked before - with valve core back in. Hey Presto, seated as near as. Pumped with foortpump and a few healthy sounding 'pings' and some more from 'bouncing' the wheel and all was well. Was surprised I got it up to about 80lbs so easily with a simple foot pump. Anyway all looks well and a pour of water round the rims showed no leaks so all hunky dory. 1 up for the canister, and little sweat involved.
Aha, so, the rear. What a ****ing C-word bars-steward of a job that was to get off. Think I'll stick to the TCKs as maybe they don't have the same steel reinforced walls as Tourances? Anyway the frickin bead would not break so I broke out the bead breaker so well marketed on here previously and that did the trick much more easily. Shame I had to use it though - have to be 'part of the kit'. The 20 mins went well and truly out the window, great practice though as no rush and no baking heat, you just have to practice to get the techniques.
The new tire went on OK - especially once I stopped effing and blinding and used technique....hmmmm...so much easier when you pay attention to what you're doing
The whole point of the excerise
Being bigger the rear did seat without the CO2, a good bounce about and some pumping with some pushing on the lesser areas and we was away, sealed and sorted, cracking grommit!
So, overall, apart from the **** up on the rear it was proof it can be achieved, and better practiced here than under the baking desert heat

Must pack a brolley so the dolly can shade me if required.
I bought some tyre lube and rim protectors off t'web, used a CO2 I've had lying around for years, and just my standard tools (+ bead breaker). I do carry a long lever stuffed up the frame spine and the toolkit ickle ones. The big one just makes things easier, and can be used for other things like an offensive weapon.
The whole point wasn't to save dosh - in fact it's well worth the fitting charges for the ease - but was to ensure I'm happy (relative word) undertaking this at the road side. The only thing I used that I wouldn't have was an old tire as a 'rest' to save the discs and rim. (well worth keeping one at home, also very handy for supporting your tank when taken off.)
Its worth a go if you like to dig yourself out of trouble, or if you are planning getting away from it all - otherwise fine, stick with the fitters
It is definately possible, and those little CO2 cannisters are quite a surprise...that said, maybe it wouldn't work on the volume of a rear? I'll try it sometime and report back.