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Ryan B.

Ryan B.

Ryan B.

Ryan B.wrote a review of on November 28, 2017

3 5

Familiarity: I've used it once or twice and have initial impressions

I usually run a PDX in the front and MXP in the back, both tubeless. But after a disastrous muddy race with that combo and more rain in the forecast a few weekends later I ordered the BOS for the back instead. From the get-go, I noticed two things. First, on my 19mm ID wheels, both the PDX and MXP measure out to about 37mm wide, but the BOS was right at 33, so much narrower. Secondly, this tire is much stiffer than the other two (probably because of the heavier tread) and was much, much, more difficult to get to seat tubeless. The MXP and PDX took about 2 minutes each, the BOS literally took an hour of swearing and a ton of soapy water. But once I finally got the bead to pop it sealed up well and held air nicely.
On race day (and pre-riding the day before) it didn't rain nearly as much as forecasted and the tire was clearly out of its element. On loose-over-hard conditions, dust, or soft but not washed-out soils the aggressive tread and narrow width means the tire just digs a rut and doesn't actually propel you forward under power. The result was similar to a mud-covered tire: tons of work to just spin in place. By the end of the race I definitely wished I had just left my MXP on the back.
I think there are conditions where this tire would do well, namely total mud bogs where you want a tractor tire/paddle wheel effect. It does shed mud extremely well, is very predictable in corners (at least out back) and doesn't feel slow on other surfaces despite the aggressive tread, but hard efforts on loose surfaces or going up short, steep hills are wasted digging into the ground instead of rolling over it. Unless your race is looking like a total washout, I wouldn't recommend this.

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Ryan B.

Ryan B.wrote a review of on December 21, 2012

4 5

The first thing I noticed about these tires was how well they rode. It may be that it's my first time on 25s (as opposed to 23s), but I really appreciated the improvement in comfort. They also roll fast and seem plenty grippy. Unlike the reviewer below I had no trouble getting these on, but that is probably more wheel-dependent than anything else.

I deducted one star, however, because, despite less than 500 miles on fairly clean roads, my rear has a pretty serious cut in it. The cut did not penetrate the casing, but it went all the way through the rubber and is fairly long. Time will tell how well they hold up but I found this to be concerning.

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