the carbon speed 42mm rims

[cernymuz]

Does anyone have more insight on these rims?
http://www.xmcarbonspeed.com/Productinfo.asp?f=1364

is the spoke offset negative or positive? meaning if it adds or reduces the spoke cross. If it adds, it would be pretty awesome rim

[Oolak]

I'd like to know the answer to that too. Also, what size tire for a 43mm rim? 3 inch?

[cernymuz]

42mm is outside. inside is 36mm, which is wide, but not completely unreasonable. IMO any 2.2"+ tire will be fine

[325racer]

I wouldn't necessarily say any 2.2 tire would fit until tested.  For reference I'm running the 35mm wide , which is 30 on the inside.   Have a 2.1 Thunder Burt mounted on there, but is extremely difficult to seat as the tire doesn't want to spread out that much without some help.  So on a 35mm wide opening some 2.2 tires may not open up enough to seat properly, which may leave them to burping or rolling off the rim in hard use.

Bottom line, if running a 42mm wide rim, you ahould probably run a 2.35 minimum, more likely a 2.5.

[MTNRCKT]

I wouldn't necessarily say any 2.2 tire would fit until tested.  For reference I'm running the 35mm wide , which is 30 on the inside.   Have a 2.1 Thunder Burt mounted on there, but is extremely difficult to seat as the tire doesn't want to spread out that much without some help.  So on a 35mm wide opening some 2.2 tires may not open up enough to seat properly, which may leave them to burping or rolling off the rim in hard use.

Bottom line, if running a 42mm wide rim, you ahould probably run a 2.35 minimum, more likely a 2.5.

Good info - Thanks. Will a 2.5 fit through most of these chiner frames?

Guess I haven't been keeping up with the trend as well as I thought I had bc 42mm seems really wide to me. I'm definitely intrigued though and will do some reading.