Well, in my initial fit of enthusiasm, I guess mis-spoke a couple of things:
- My rims are 517, not 519 - so same 17mm internal width (22mm external)
as yours, Tim. They sure seem narrow, but I'm glad to hear they've worked
well for you.
- The tires have now stretched quite a bit, so I don't have quite the
clearance I thought I did. Still way more than adequate everywhere
*except* at the rear seatstay brace, where they used a caliper brake-mount
bridge and positioned it based on brake standards rather than matching the
clearances at the fork crown or chainstay brace. So I had to notch the
fender to get adequate clearance at that location.
- Speaking of fenders: For other SKS/Esge fans, the P45 works MUCH better
than the wider P65. ( I happened to have both). The rounded shape of the
45 follows the contour of the tire pretty well, even though it isn't quite
as wide. The squared-off sides of the P65, on the other hand, actually
rub the tire and have less clearance, unless you happen to have a ton
of extra vertical space.
- Even though I won't need one, I got curious and decided to check the
news regarding the Ravn progress, over on the rCog forum. Looks like that
project might be dead. Or at least its not going to be the uber-bike that
it once was. Lots of angry and disappointed people. Seems they've been
having trouble getting a manufacturer who is skilled enough to build with
the flexy, raked fork blades, cantilever brakes, and precision tubing
tolerances. . I really hope that doesn't mean that these tires will be
available only as a fleeting thing. As pointed out above, there probably
aren't that many non-custom bikes out there that can even utilize them,
other than these XO-1s, All Rounders and smaller Atlanti.
On Saturday, October 10, 2015 at 7:34:46 PM UTC-6, Tim Gavin wrote:
On my 26er ('88 Schwinn KOM
> <http://s1060.photobucket.com/user/Tim_Gavin/media/KOM/IMG_00601_zpsddqpqsoj.jpg.html>),
>
> I'm currently using even less-stiff, less-wide Mavic 317 rims (17 mm
> internal) with 60 mm Super Moto tires. Before I got the new wheels, I was
> using the original Araya RM-20 rims (19 mm internal). I've never had tire
> pressure issues or experienced the tire rolling, and I ride my KOM pretty
> aggressively over pretty much anything. I love bunny hopping and jumping
> with that bike; it's amazingly playful for such a stout, heavy bike.
>
> I use about those same pressures for mixed terrain riding, and I weigh 220
> lbs. I've lowered the front to 20 psi before when I'm doing solely dirt
> and gravel, and pumped it up to 30 psi when I'm riding only on pavement.
>
> I experience the same sure traction on gravel with my Super Motos.
> They're wide enough that the tire floats over the top and the tread can
> deform enough to get good grip. The only times I wish I had more tread is
> on loose dirt or wet dirt. I have a set of Thunder Burts waiting to get
> swapped in for a ride like that. I'd love to see the Thunder Burt in a 60
> mm width.
>
> Tim Gavin
> Cedar Rapids, IA
>
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