So I looked at the rev9 CRR tire study and was wondering about the Tufo S3 lites listed.
It looks like I am “losing” about 5 watts per tire on CRR,
The test was done at 51 kph, are the losses the same (i.e. 5 watts/tire) at say 36 kph?
Also these tires are pretty bomber for me, last a long time and pretty reasonable price. Looking for some ST advice on the tires you used this year, and which ones on the list would have:
Equal durability and puncture resistance to the S3 lites, but better CRR
Also it says 135 grams where mine weigh 210 grams. All the S3 lites I have purchased are 210 grams, it doesn’t look like that tire was tested.
Something to consider. Every flat I’ve gotten would have also flattened a Tufo. From bombproof training tires through thin racing slick tires. I ride on average roads. You are giving up a lot of “free speed” from running those tires. They make great training tires, but I wouldn’t race on them. I’ve had good experiences with the Vittoria Corsa EVO.
Thanks,
Any idea on how the wattage lost changes with speed? They say about 5 watts per tire on the S3 lites but thats at 51 KPH
Power to overcome rolling resistance is Pr = (9.8 * W * Crr) * V
where W is the total weight of rider + bike and V is velocity. As you can see from the equation, Pr is proportional to velocity in a “linear” manner. The faster to go, the higher the power lost due to rolling resistance. You can use this equation to calculate Pr at 36 KPH and determine the difference.
I have a mix of Vittoria, Challenge and Veloflex tires on different wheels. All seem reasonably close to as flat resistant as the light Tufos. On the road they are all worlds faster feeling than the Tufos. Even in the weight-weenie world Tufos are considered ‘for the scale,’ but no self-respecting ww would ride them for real.
Get a nice pair of Vittorias and not only do you get free speed, but the ride quality is significantly better as well.
Keep in mind the chart you are looking at is rolling resistance on the rollers. In road tests (I think both AFM and Tom Anhalt have done comparisons) the on road losses are about 2x the chart values. I’m assuming the speeds on the road were at about 20-25 mph, but you should check with them for the exact protocal.
Keep in mind the chart you are looking at is rolling resistance on the rollers. In road tests (I think both AFM and Tom Anhalt have done comparisons) the on road losses are about 2x the chart values. I’m assuming the speeds on the road were at about 20-25 mph, but you should check with them for the exact protocal.
Thanks Guys,
Looks like the vittorias might be one to try for next year,
Still can’t figure out why my S3 lites say 210 grams and the ones tested were 135 grams? for an extra 75 grams you would think that they might roll a bit better than the ones tested.
Anyways I guess I have a garage full of pretty good training tires.
S3lites are a line of tires with various weights. the 135s are mostly for track the 210s are more of an every day road tire and almost certainly have worse Crr than the 135s
.
Has any one tried the newer Tufo Elite Pulse tire (either tub or clincher/tub)?
Would like to know whether they’re actually improving their products or not.
Cheers,
SteveMc
Haven’t, but I would like to see them make a tubular with a latex inner barrier rather than butyl. Crr aside TUFOs are great tires. Light durable, straight.
Still can’t figure out why my S3 lites say 210 grams and the ones tested were 135 grams? for an extra 75 grams you would think that they might roll a bit better than the ones tested.
Rolling resistance is proportional to weight. If you want to reduce rolling resistance some, try shedding a few pounds from rider and bike.
The Tufos might be good training tires, because they are slower than hell. I gave mine away when I found I was faster on my Shimano training wheels and Serfas tires than my H3s and Tufos. (I sold the H3s because I was tired of tubies.)
Keep in mind the chart you are looking at is rolling resistance on the rollers. In road tests (I think both AFM and Tom Anhalt have done comparisons) the on road losses are about 2x the chart values. I’m assuming the speeds on the road were at about 20-25 mph, but you should check with them for the exact protocal.
I find it to be ~1.5X for Crr on real roads, while Andy Coggan “sees” more like 1.4X