I have the biketechreview pdf up now and have read many of the existing threads on the subject. There appears to be some interest in the Attack 22mm tire, but no crr data. The force, a 24mm tire, also is absent in the crr test, but I assume these two would test similarly to the GP 4000s. An added benefit is the screaming deal on PBK now for this combo: $67.
Curious if any of you have opinions on these for a TT setup.
I am running a ST groupbuy 50mm front carbon clincher with a Zipp CSC rear with a wheelbuilder cover on a P2k.
i have them mounted on my Real Supersonic 60(FP60) for my ('08)QR Caliente. the attacks are pretty grippy
but not as progressive as the pro2race they replaced - the transition from straight to banked can feel somewhat abrupt
until they wear in a bit. the Force rears are very comfy and have excellent traction. overall, they roll well, but not
as well as the pro2races which i lament as not being made anymore.
here’s my assessment(non-scientific):
grip: good/excellent
durability: very good(resists punctures well)
speed: as fast as pro2race
comfort: high(24mm rear is a good compromise between volume and width)
RR: not as good as pro2race(those felt like they rolled forever)
I dont remember where/when I saw the crr data for those, but it was pretty sluggish. I know the 4000s tends to not fare so well for a higher end tire, either, but the force/attack is worse.
I still use the attack on the front of my training bike- the force got scrapped after I pinch flatted in a RR @ 110 psi on a gravel road. I’m nowhere near heavy, so this kind of turned me off. The 4000s roll great and compared to everyone I know on pro race 3’s, they seem to be alot tougher.
-Physiojoe
thanks. Speed is number one. These will only be usewd for tts. The bonty tt tires won’t mate well with my carbon clinchers from what I hear. Is there a general consensus on which tire is best outside of the bonty tt and not for c2 rims.
thanks. Speed is number one. These will only be usewd for tts. The bonty tt tires won’t mate well with my carbon clinchers from what I hear. Is there a general consensus on which tire is best outside of the bonty tt and not for c2 rims.
i have them mounted on my Real Supersonic 60(FP60) for my ('08)QR Caliente. the attacks are pretty grippy
but not as progressive as the pro2race they replaced - the transition from straight to banked can feel somewhat abrupt
until they wear in a bit. the Force rears are very comfy and have excellent traction. overall, they roll well, but not
as well as the pro2races which i lament as not being made anymore.
here’s my assessment(non-scientific):
grip: good/excellent
durability: very good(resists punctures well)
speed: as fast as pro2race
comfort: high(24mm rear is a good compromise between volume and width)
RR: not as good as pro2race(those felt like they rolled forever)
Any chance you could take a photo showing the Attack tire profile shape. I’m thinking that the leading edge shape is elliptical which result in good aero performance.
Not sure why you think the Bonty TT won’t mate with your rim. The Gigantex rims aren’t anything different in dimension at the edge. I have Bonty TT’s on my Renn Disc and Reynolds Strike’s with no issue on fit. You do need a dose of patience to get the flat seated all the way around.
Any chance you could take a photo showing the Attack tire profile shape. I’m thinking that the leading edge shape is elliptical which result in good aero performance.
I don’t know how elliptical you can actually make a tire and still have reasonably low rolling resistance (and good handling).
I dont remember where/when I saw the crr data for those, but it was pretty sluggish. I know the 4000s tends to not fare so well for a higher end tire, either, but the force/attack is worse.
Wrong… not true for the new ones. Old Contis were slow, but the new ones with Black Chili tread are very fast and durable.
If you want fast then get the Conti SS. I sent Al a 20mm last year and it was one of the lowest Crr tires he’s tested. The 23mm (actually 22mm wide) should be even better.
The test was done late 2008, so the 4000s are black chili. They are around mid-pack, about the best conti clincher on the chart. I know these tests don’t apply even close to 100% in real world situations, hence why they still feel fast and are extremely durable- so I’m pretty much agreeing with you
-Physiojoe
Al’s chart is highly biased towards light open tubular tires, since these are the ones people are most curious about for top performance. The Conti GP4000S tests as well as any comparable (ie semi durable) tire. And IME, the GP4000S is very long lasting and puncture resistance. Now that the Pro2 is gone there is really no competition in that market, IMO. The Attack and Force share the same casing as the GP4000, but they appear to be lighter, so they likely have less tread. Crr should be comparable or better.
The SS has the same casing material minus the anti-puncture layer and also less tread. I haven’t had trouble with flats, but they obviously won’t last as long as most other tires. The chart hasn’t been updated in awhile, but Al posts data on the forum occasionally. The 20mm Conti SS tested at .00251 Crr, which puts it right near the best. http://biketechreview.com/forum/1-general-discussion/24363-new-crr-data-including-mp3l#24363
looks pretty round to me. tire pressure is about 95-100
right now
Thanks - if you zoom in on the leading edge it looks somewhat elliptical, but having said that I can’t quantify the benefit. From the limited data I’ve seen the more elliptical the better whatever that means. Here is a picture of the Bonty Aero Wing 19 on the left and a soon to be released Bontrager tire on the right. The ellliptical leading edge can be seen on the Bonty tires.
