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Wind drag? On a MTB?BruceBrown said:According to NoTubes.com:
... Tall knobs on other tires create wind drag and rolling resistance slowing the rider down ...
BB
don't be hatin just because I've got 2 29ers and you're still waiting on your frame. LOL!z0s01 said:I don't even know where to begin.
Done. I'll skip the "shill" topic - be it fun, tongue in cheek, serious or what have you. I enjoy the board for the sharing of product use/testing/knowledge/experience. 'Nuff said. :thumbsup:one1spede said:very interesting. would anyone mind putting calipers to the casing? curious to see how they actually measure once mounted. thanks!
I look forward to your report on running them tubeless. I bet the grip is much improved in the 20 - 25 psi range.POG said:Mine should be here Tuesday and I will be running them tubeless on ztr olympic rims. They should work well for trails around here as well since our "rock gardens" are made of tree roots.
BB - Kind of off topic, but I have some sizing questions for you. I am still searcing for the perfect CrossCheck tire for all terrain. I can fit the 2.0 Big Apples mounted to Mavic T520 rims in the frame and fork, but just barely, and those tires don't provide the traction I need in the dirt.BruceBrown said:It measures 47mm wide mounted on the Speed City and Open Pro rims. Pretty much the same as the Schwalbe Big Apple 2.0's measure on those rims.
Having experimented with the XR 1.8's - I can say that they did not provide enough volume to be so cushioned for roots at the psi I wanted to run. I have to air the XR 1.8's down to get enough cush to tolerate them on roots at speed. The Crows trump the XR 1.8's in both cushion and weight. The XR 1.8's are 30 - 60 grams heavier and the casing is 6mm less in width than the Crows.
Yo! Where are the pictures of the Willits? Get 'em posted sir! Making me wait is a :nono: Glad it turned out and your wife is starting to get used to it.lanpope said:BB - Kind of off topic, but I have some sizing questions for you. I am still searcing for the perfect CrossCheck tire for all terrain. I can fit the 2.0 Big Apples mounted to Mavic T520 rims in the frame and fork, but just barely, and those tires don't provide the traction I need in the dirt.
You say the Crows are basically the same size as the BAs and the 1.8 XRs have a 6mm smaller casting, but you didn't mention the knobs (may not matter?). I am hoping to run either the Crows or the 1.8 XRs on my CC. Based on this information - which tires, if either, do you think I can fit?
Thanks -
LP
PS - The Willits is built and it turned out great. The wife has about 20 miles on it and her main impression on the easy singletrack that we rode was..."This thing get's going faster than my old bike" She took 2 downhills that I don't remember her riding in the past, and its been nearly a year since she was on a MTB. Good stuff... Thanks again for that.
So, No Tubes has found a cure for mechanical friction? What's next, gravity?BruceBrown said:- When used tubeless, rolling resistance is nearly eliminated. The Crow will roll as fast at 20 psi as it does at 40 psi. Rolling resistance will not come into play until pressures drop as low as 13 psi
You are absolutely right. The discussion needs to include the limitations.unit said:but if anyone actually tries these on rocky (sharp rocks), dusty, or muddy conditions, could you please report back.
I seriously doubt that these are going to be like the Exi's that I like so much and perhaps shame on me to even want to compare the two, but I would like to know if they work better than I might expect in the conditions I describe.
It is a good looking tire for hardpack racing conditions IMO, but am I dead on correct to think that the sidewalls are pretty exposed, and cornering in slick, muddy or dusty conditions would appear difficult?
I am not attacking these things...I am sure they have their place(s), I just think some discussion of their limitations would be nice.
Thanks
Saw those rims at MC's shop. Interesting but I'll wait until my Rynos perish.Cloxxki said:They also make overbuilt 29" rims, for freeriding, in 32h, so everything is possible.
Zero rolling resistance would cut 50-60% of all energy used in XC racing.
Well, I raced them today in a 3 lap sport race. Twisty singletrack with some loose dirt corners and climbs, several wooden bridge crossings, very few roots, several logs to bunny hop and a gravel road climb. Tires did not break loose one time during the race and I was pleased with how they rode for the entire race. Great on climbs and bit into the corners on descents with no worries. I never had to swing wide on any tight corner as I felt glued to the trail. Very agile and nimble coming out of tight corners and areas where you need to pump on the cranks to quickly accelerate. Much more so than any other 29"er tire for off road that I own (Nano's, XR's, Exi's, ACX's, Notos and Klaws).Fastskiguy said:Hey, thanks for the ride report. I think they look great, for an XC race tire. Here in Illinois we have firm or hard packed dirt and not many rocks and I'd like to roll a little faster and save a little weight. They sound perfect for this. Will have to line me up a pair
First of all - I am only comparing them on absolute dry conditions as I haven't had the chance to take the Crows out in softer dirt. We're having a drought here in Iowa and things are packed, dry and super fast making any tire roll like the wind at the moment. And I have only run them tubed up to this point.Cloxxki said:Thanks for the report Bruce!
How about rolling resistance, the main deal in cycling, how would you compare them to your fastest rolling tire?
Really? What's the volume index of the Karma's on the Delgado Disc? I need to mount one of the Crows up on one of my Dyads to get the "official" volume index to mate with Shiggy's excellent specifications data.big & single said:Those things make a Karma look positively meaty!