Hi D.Y.,
Although I can’t speak to the relative flex of the three 36er models you are considering, I figured I’d take on your questions because in the past I have commuted to work in Salt Lake City’s Research Park on an older (2010) double-hoop Nimbus Nightrider equipped with Magura rim brakes – and I never had a problem with the brakes rubbing.
Even though many folks have experienced the annoyance of rim brake rubbing during steep climbs on a 36er, I suspect the reason that I never experienced it during my commutes was that I was either not generating the level of torque that causes the problem, or the hills I was able to ride up didn’t require that much pressure on the pedals, even though my Nightrider frame is pretty flexible.
My (former) commute of about 6.5 miles brought me from South of Parley’s Canyon on Wasatch Blvd., to the North across the bike trail bridges spanning I-80, continuing along Wasatch Blvd. (to avoid the traffic on Foothill Drive) all the way through Bonneville Golf course, behind the Hogle Zoo, down Crestview to Emigration Canyon Rd./Sunnyside Ave., down Sunnyside Ave. to Arapeen Dr., and up Chipeta Way past ARUP to the top of Research Park. The most significant hills on this morning route are (1) the climb to the top of the bridges over I-80, (2) the climb up Wasatch Blvd. through the Golf Course and behind the Zoo, and the final climb up Chipeta Way. The hardest of these hills for me was #2. The first few times I rode this route, I had to walk the last part of Wasatch. Eventually, as I got stronger and more comfortable on the big wheel, I was able to ride it all. I also usually had to rest and catch my breath on the bridge over I-80 after hill #1, and I found that the best way for me to tackle the final climb was to “stair step” up through the ARUP parking lot, rather than ride straight up hill #3.
I hope that gives you some idea of what is possible/reasonable for a guy who, at that time, was in his early 50s and had limited “saddle time” on a 36er. Sadly, I had to start working downtown just over a year ago, and the commute of ~10 miles with significant (~500 ft) elevation drop effectively ended my 36er commuting days. The ride to work wouldn’t be that bad, but the ride home would be too much, especially with me now having to work 9+ hr days, on average. Plus, the objective hazards of the commute to Research Park were acceptable because of the route. In contrast, commuting on unis through downtown SLC traffic presents an unacceptably high risk of injury or death to me. (I’ve lost a friend to a commuting accident in Washington, D.C. in the past, and b*ke riders are hit and killed in SLC regularly.)
BTW, I’m not certain of the grades of those hills I used to encounter on my commute, but I suspect the steepest one on the order of 8%. I’ve attempted 11% grades on my 36er, and can only manage them if they are short. Results may vary, especially for younger, stronger riders; and the hills do get easier with experience.
If you have further questions about riding in SLC, send me a PM, and come out and join us for Muni some time.
Cheers,
UPD in Utah
(a.k.a. Bert)