Continental

I bought a set of Race Rapid Dubnitals after reading their rolling resistance reviews, puncture resistance, and prior experience with 2.2 Black Chili Race Kings. I wanted a light, fast rolling, durable tire for the Whiskey Off Road 50 to attempt a PR effort and these did not disappoint! Only regret I have was not getting them in tanwall. :-)

Dubnital race rapid 2.4. SW AZ, desert, mostly loose over hard pack with plenty of chunky rock conditions. As expected these are fast tires confirmed in testing. As a rear tire they have very good traction on punchy loose climbs and noticeably better than say a Recon Race. As a front tire they are good but they don't give any warning when they're about to cut loose. Push it too hard and it's gone. For me they like as low a pressure as I can run without whacking rims. They are narrower and a more rounded profile than the equivalent Maxxis tire size.

These tires roll fast enough for me to keep up with a friend on a road bike. I was putting in more effort but I was extremely impressed with the speed.

I am also impressed with the off-road capabilities of these tires on all types of terrain - loose over hard pack, shale, pebbles, larger rocks, sand, etc. Probably not the most stable tires in the world but the tradeoff for their speed is well worth it. Also, the side / edge knobs have saved me numerous times.

Unfortunately, I've had two tires ruined with non-save-able punctures in the last three weeks. The first was some debris on a road, likely something metal and sharp. The second was on a trail full of rocks and sticks. I would gives these Dubnitals 5 stars except for the two tires I had to put a tube in to finish my ride and toss afterwards :(.

I've been riding Conti's for about 10 years now; clinchers with tubes. I got occasional flats but, and it may be luck, haven't had a flat now for almost 3 years and 7K miles. It may be that going to wider tires (I'm now on 30's) and lower tire pressures (now at 60 & 65) result in fewer flats? Conti's have a reputation for being hard to mount. This was true on my 21mm internal alloy wheels. But, I am able to mount the 30's on Vision carbon wheels using only my hands. So, it seems the right combination of wheel and tire make a difference. I got about 3K on size 25mm but am getting more than that since upsizing. They roll nicely on the Vision wheels with Silca TPU tubes; low rolling resistance and reliable combo.