I was wondering exactly which combinations people find really tough to remove or fit?
Some tyres slip on like a baggy old jumper, others fit like a ten-year-old wetsuit.
One example I have is fitting a Continental GP4000 on a Mavic Open Pro rim.
Thanks in advance!
Mike
Gazaloddi 26x2.6 on Planet X BMF rim. Takes two tyre levers and a screwdriver to get off, even with all the moving it to the middle of the rim stuff. Although now I have some metal tyre levers ready for next time I have a puncture.
Took about 15 minutes for 2 of us to put it back on last time too.
Joe
The hardest combo I’ve ever had to deal with are the 12 1/2" tyres on my daughter’s bike. They’re Nutrak ones, with “snake and sable” tread, unknown make of rims. Absolute sod to get the bead over the rim - I had to resort to using a metal tyre lever, and did check at least once that I’d actually bought the right size of tyre.
Apart from that, the only one I’ve always had to use levers to fit is the TA 36" (both on the old QuAx steel rim and the Stealth Pro). It’s a lot easier on the Stealth rim than on the steel one, and can almost be pulled over without levers.
I use Conti Gator Skins on Mavic Open Pros on the road bike and they’re quite tight, but can be pulled on without levers (just).
Duro Leopard 26x3 on Alex DX32 - really easy.
Richey Z-Max 26x2.1 on DX32 - really easy.
Panaracer 26x1.5 road tyres on Sun Rhino rims (tandem) are pretty hard - usually have to use levers to fit.
But nothing beats those little 12 1/2" buggers.
Rob
24"x3.0" Duro Leopard on the Large Marge rim. I simply cannot get it off. I can’t even get tire levers under the bead. Hopefully I never get a flat.
Try-all white on a the try-all reinforced street rim. It is a real pig to get off, definatly the hardest I have had to remove. Oposite end of the spectrum, tyres come off the 07 kh29 rim realy realy easy, you dont even need tyre leavers. It hasnt ever popped off whilst riding tho so its all good.
Luna tire and Alex DX32
The tube you use plays a big part in it, too.
Maxxis Creepy Crawler on a Nimbus Nightrider rim.
hahah nice 
Interesting, and at what point did you give up trying to fit it?
Although if you were taking it off after use, we all bow before you!
hookworm or gazz onto anything…
Onza Sticky Fingers, on a VIZ 19 inch rim.
I have the same combo, and I’ve had to do just what you fear many times on the trail. No matter how old the tire, it never gets much easier. Breaking the bead is the worst part - there are channels inside the rim where the bead essentially locks in after the tube is inflated. Breaking it out of that channel post-flat is really tough. Then you have to center the bead on the opposite side of the rim to get enough slack to use a tire lever. When I’m soloing, a flat can mean up to an hour of downtime.
Once I flatted while riding with Hans in SB. He broke the bead with his fingers and got the tire off the rim and back on again in under 15 minutes without even using levers. It was rather impressive.
this year down in portland i broke about 4 tire levers trying to get an old CC tire off of a DX32 rim… it sucked ass
+1. Probably the hardest for me too.
5.10 x 17 knobby dirt bike tire
I have been doing tires for years, so even the monster isn’t so bad.
17 " is the rim size, the tire is the same size as a 24 Duro, but fatter and 10x as thick.
To break the rim seal, use c clamps.
Leave the tires in the sun, a cold tire is stiffer.
Put the tire on the ground and kneel on it to keep the bead (the metal wire inside the edge of the tire) in the center of the rim, opposite the side you are trying to pry off. If you can’t get get it to pry over the edge, that is what you are doing wrong.
A bowl of soapy water and a brush to generously lube it up is also helpful.
As I was going to say 
20"x2.5" hookworm on the stock nimbus 26" rim.
I was gonna say CC and Alex D32, but now those arent too hard. I think I could get them with just my hand. Ill try tomorrow.
Everything slides on and off the Kh and Nimbus 19" rims so…
Im not sure. Ill have to try some of the rims and tires you guys are saying.
i smell a group product test