I live, race and train on a lot of chip seal and GP5000 works great. Tried both 23 and 25. 25 is faster. I wouldn’t use any other tires because never got a flat for the past 4 years. I do replace them every year before the season start though. Both tubes and tires. Not worth taking any chance.
Even if the TT was heavier, I’d still run them over the original 5000.
I would too! In fact I did and even switched to a heavier 28mm rear as the weight has such little relevance.
With about 10w of rolling resistance difference I was curious what logic could justify the old tire 
Where/how do you get 10w?
I’m wondering, I see rather 4w on aerocoach data and 3w on bicyclerollingresistance when comparing a pair for a latex tube GP5000 clincher vs a GP5000 TT TLR.
Yes that’s what the (German magazine) TOUR test says too.
gp5000 28: 16.2w on smooth surface; 22,9 rough
gp5000 tt tr 30: 14.1w on smooth surface; 19,5 rough.
They testet with TPU in the 5000, and with sealant in the 5000 tt.
weight: 5000 28 252g; 5000 tr 30 253g.
Mind the difference in size. Would have liked to see the difference both as 25mm.
Is the difference really 4W per pair comparing the 9000 25 with latex and the 9000 tt 25 with latex?
Is the tt more difficult to install on a standard clincher wheel than a normal 9000?
Even if the TT was heavier, I’d still run them over the original 5000.
I would too! In fact I did and even switched to a heavier 28mm rear as the weight has such little relevance.
With about 10w of rolling resistance difference I was curious what logic could justify the old tire
Where/how do you get 10w?
I’m wondering, I see rather 4w on aerocoach data and 3w on bicyclerollingresistance when comparing a pair for a latex tube GP5000 clincher vs a GP5000 TT TLR.
BRR quotes watts at 29k/h and one tire. But if you take their CRR numbers (yes you have to consider the caveats…)
At 80PSI they give .00363 for the regular and .00252 for the TT, difference of .00111
at 80kg total weight, 40km/h
80 * 9.8 * 40/3.6 * .00111 = 9.67watts
Even if the TT was heavier, I’d still run them over the original 5000.
I would too! In fact I did and even switched to a heavier 28mm rear as the weight has such little relevance.
With about 10w of rolling resistance difference I was curious what logic could justify the old tire
Where/how do you get 10w?
I’m wondering, I see rather 4w on aerocoach data and 3w on bicyclerollingresistance when comparing a pair for a latex tube GP5000 clincher vs a GP5000 TT TLR.
BRR quotes watts at 29k/h and one tire. But if you take their CRR numbers (yes you have to consider the caveats…)
At 80PSI they give .00363 for the regular and .00252 for the TT, difference of .00111
at 80kg total weight, 40km/h
80 * 9.8 * 40/3.6 * .00111 = 9.67watts
Thanks for clarifying, I didn’t have the low speed of BRR in mind. (I did the x2 for a pair though)
Nevertheless, are you really looking at the latex tube version of BRR? (they test a lot with butyl, which makes little sense to compare I believe).
Aero coach’s data is also meant to be at 45km/h and far from 10w.
At 10w it’s a different consideration for sure, at 3-4w maybe the piece of mind of no flat evens it out.
They don’t quote latex so yes, there is a difference there. Their TT number is no tube and regular with butyl, so yes the delta will shrink. Too bad
They do it’s simply on a different page
https://www.bicyclerollingresistance.com/road-bike-reviews/continental-grand-prix-5000-latex-tube
.
They do it’s simply on a different page
https://www.bicyclerollingresistance.com/...prix-5000-latex-tube
Ok, so they say .003 which works out to 4.2w. Makes more sense. My apologies for confusion
I’ve been using the Challenge Criterium RS TE 700 x 27 HTLR with latex tubes since they came out in March 2023 on a road bike. Its 350tpi is a nice plush ride. They don’t ballon out on my hooked 20.5mm internal wheels measuring around 27.5.
Challenge - https://www.challengetires.com/shop/products/criterium-rs/210392
BRR - https://www.bicyclerollingresistance.com/road-bike-reviews/challenge-criterium-rs
I am using the Corsa speed for 2 years now. Never punctured and do 2500 miles with a set of tires. Very fast tires
Damn it!!! I ended up ordering Corsa Speed after seeing your comment. I’ve been skeptical about the durability but let’s see!!
That is my understanding as well, Steve. It is confusing when some of the tire tests show the tire type, but not necessarily indicate which set-up they went (IE truly tubeless, or tubless tire with a latex/tpu tube inside).
I had one puncture rolling into T1 during a 70.3 on them back in 2018, my only one as well. They are fragile but wouldn’t race with anything else. I run a 23/25 setup on my TT bike.
I had one puncture rolling into T1 during a 70.3 on them back in 2018, my only one as well. They are fragile but wouldn’t race with anything else. I run a 23/25 setup on my TT bike.
Good to hear. I compared 23/25 and 25/25 set up with GP5000 tires and 25/25 came out faster, so I like 25/25 setup.
I had one puncture rolling into T1 during a 70.3 on them back in 2018, my only one as well. They are fragile but wouldn’t race with anything else. I run a 23/25 setup on my TT bike.
Good to hear. I compared 23/25 and 25/25 set up with GP5000 tires and 25/25 came out faster, so I like 25/25 setup.
I’ve run Corsa Speeds since they were released pretty much. Mass start and TT on the road, track as well. Thousands of miles. Can’t recall a time they’ve failed me. Saved my ass at least once when I rolled over a tack literally entering the start gate of a TT. Started to spray sealant on the guy behind me (a bonus), but it sealed up, and I completed the race fine.
…one possible time they may have failed me is when I slide out in a very rainy crit even though I wasn’t taking risks. That made me wonder about their wet grip, and I’ve heard other anecdotes as well. But sometimes slideouts just happen.
I go through rear tires pretty quick on them (several per season for track), so after a few hundred miles start monitoring for bits of casing to start peaking through the tread.
I had one puncture rolling into T1 during a 70.3 on them back in 2018, my only one as well. They are fragile but wouldn’t race with anything else. I run a 23/25 setup on my TT bike.
Good to hear. I compared 23/25 and 25/25 set up with GP5000 tires and 25/25 came out faster, so I like 25/25 setup.
I’ve run Corsa Speeds since they were released pretty much. Mass start and TT on the road, track as well. Thousands of miles. Can’t recall a time they’ve failed me. Saved my ass at least once when I rolled over a tack literally entering the start gate of a TT. Started to spray sealant on the guy behind me (a bonus), but it sealed up, and I completed the race fine.
…one possible time they may have failed me is when I slide out in a very rainy crit even though I wasn’t taking risks. That made me wonder about their wet grip, and I’ve heard other anecdotes as well. But sometimes slideouts just happen.
I go through rear tires pretty quick on them (several per season for track), so after a few hundred miles start monitoring for bits of casing to start peaking through the tread.
I’m planning to use latex tube with them as my wheels are not tubeless…
My take on the various tyre options. I always run these tyres with latex tubes inside so that it’s easy to swap them before races depending on the requirements.
Veloflex Record - more robust than you think, similar aero to Corsa Speeds, but the fastest thing. Doesn’t matter that they’re less aero than the GP5000 TTs, they’re always marginally faster overall especially in the 25s which have very low Crr. Used to have poor wet grip but that’s been improved.
Vittoria Corsa Speed - marginally behind Veloflex Record in terms of Crr but otherwise identical, with better wet grip. I would choose these over GP5000 TTs unless the road surface is really terrible.
GP5000 TT - a mega tyre which you can train on if you want, the aero/Crr combo makes it the best all rounder by far, but not the out and out fastest option which is VF Record.
Michelin Power TT - I quite like these, not bad for training, wet grip is great, I’d put them in between Corsa Speeds and GP5000 TTs. Splitting hairs though.
GP5000 clincher - I use these exclusively for training. You can race on them if you want and they’re a little bit quicker than the S TR/old TL, but I’d just race and ride on 5000 TTs.
Schwalbe Pro One TT - not a bad option, I have found them a bit more puncture prone than others so stopped using them.
Any thoughts on the Pirelli P-Zero TLR ?
Yes it’s not that fast I’m afraid. Crr data here: https://www.aero-coach.co.uk/time-trial-rolling-resistance-data?_ga=2.90577050.1034456944.1692110490-2081641447.1610557084
Yes it’s not that fast I’m afraid. Crr data here: https://www.aero-coach.co.uk/...081641447.1610557084
Thanks for all the work you do Xav!
Looking forward to seeing the data on the Corsa Pro Speed from the tour TT when they come out.
Yes it’s not that fast I’m afraid. Crr data here: https://www.aero-coach.co.uk/...081641447.1610557084
Thanks for all the work you do Xav!
Looking forward to seeing the data on the Corsa Pro Speed from the tour TT when they come out.
Thank you
I was told 2024 for those.
My take on the various tyre options. I always run these tyres with latex tubes inside so that it’s easy to swap them before races depending on the requirements.
Veloflex Record - more robust than you think, similar aero to Corsa Speeds, but the fastest thing. Doesn’t matter that they’re less aero than the GP5000 TTs, they’re always marginally faster overall especially in the 25s which have very low Crr. Used to have poor wet grip but that’s been improved.
Vittoria Corsa Speed - marginally behind Veloflex Record in terms of Crr but otherwise identical, with better wet grip. I would choose these over GP5000 TTs unless the road surface is really terrible.
GP5000 TT - a mega tyre which you can train on if you want, the aero/Crr combo makes it the best all rounder by far, but not the out and out fastest option which is VF Record.
Michelin Power TT - I quite like these, not bad for training, wet grip is great, I’d put them in between Corsa Speeds and GP5000 TTs. Splitting hairs though.
GP5000 clincher - I use these exclusively for training. You can race on them if you want and they’re a little bit quicker than the S TR/old TL, but I’d just race and ride on 5000 TTs.
Schwalbe Pro One TT - not a bad option, I have found them a bit more puncture prone than others so stopped using them.
I really appreciate this review. VERY helpful!