Pirelli P-Zero Race TLR RS - New All-Rounder King?

[TobinHatesYou]

Pirelli not exactly making choosing tires size easier. On 25mm internal, the 32 will end up around 35mm - that's pretty fat. And ironically the "mis-print" chart is what the sizing should be - 23 - 25mm internal is or will be the likely width standard on which we will be running with 32mm tires. So what's next for Pirelli? Maybe re-size the tires to correspond with that chart?

Anything between 29-34mm is to be sized on a 21mm rim according to ETRTO guidelines.

[stalkersk]

Pirelli not exactly making choosing tires size easier. On 25mm internal, the 32 will end up around 35mm - that's pretty fat. And ironically the "mis-print" chart is what the sizing should be - 23 - 25mm internal is or will be the likely width standard on which we will be running with 32mm tires. So what's next for Pirelli? Maybe re-size the tires to correspond with that chart?

Even GP5000 S TR in 32 end up 34,4mm on 25mm internal rim.

[cleanneon98]

Yeah I was going to say I came from Continental and the Pirelli are only marginally narrower on my 23mm internal RSL51 wheels, both tires in a 28mm labeled

GP5000 were a hair over 31mm
TLR RS are a hair under 31mm

[Mr.Gib]

Pirelli not exactly making choosing tires size easier. On 25mm internal, the 32 will end up around 35mm - that's pretty fat. And ironically the "mis-print" chart is what the sizing should be - 23 - 25mm internal is or will be the likely width standard on which we will be running with 32mm tires. So what's next for Pirelli? Maybe re-size the tires to correspond with that chart?

Anything between 29-34mm is to be sized on a 21mm rim according to ETRTO guidelines.

Right, but are you riding 30mm+ tires on 21mm internal? Is anyone with aero intentions doing so? My point remains; how about more companies give us tires designed for the way we actually use them. Specifically, just give me wide enough tread on a tire that sits reasonably flush with my wide rims. It's not asking a lot.

[toxin]

Everyone should take a page out of spesh's and hunt's books and make rims with smaller internals and wider shoulders. It'll be better for everyone.

[TobinHatesYou]

Right, but are you riding 30mm+ tires on 21mm internal? Is anyone with aero intentions doing so? My point remains; how about more companies give us tires designed for the way we actually use them. Specifically, just give me wide enough tread on a tire that sits reasonably flush with my wide rims. It's not asking a lot.

It's mostly the external dimensions that matter, but yes I prefer them to stick to ETRTO for nominal sizing and then print appropriate "size development" charts on the box for different internal rim widths. I'd have no issue running a nominal 30mm tire on a 19mm internal, 29mm external rim like my old ENVE SES 5.6s.

[Mr.Gib]

Everyone should take a page out of spesh's and hunt's books and make rims with smaller internals and wider shoulders. It'll be better for everyone.

This sort of rim design definitely has its advantages, solves some tire fitment issues, but there is something very nice about the cornering stability of tires at low pressure when they are spread open a bit on wider rims. Ultimately, none of us care what the number on the side of the tire is as long as it nets out to the size we want. What we do care about is proper design for a wide (23mm+) rim application. Specifically, proper tread coverage. The tread coverage that might work for 21mm internal won't be ideal for 25mm.

Anybody know the flat width in mm of the tread of the 30mm RS?

[TobinHatesYou]

Anybody know the flat width in mm of the tread of the 30mm RS?

30-622 = 30mm tread, 76mm casing
32-622 = 32mm tread, 81mm casing

Both right around 39.5% coverage.

[Mr.Gib]

Anybody know the flat width in mm of the tread of the 30mm RS?

30-622 = 30mm tread, 76mm casing
32-622 = 32mm tread, 81mm casing

Both right around 39.5% coverage.

Thanks for that info. And that get's to the crux of the issue:

...my 30-622 P Zero Race TLR RS tires are now 33mm at 73psi on 23mm hookless rims after 4500km.

Is 30mm of tread enough for a tire that with WAM between 33 and 34mm?
(Side note: I wonder if treads were wider before rolling resistance testing had so much influence on tire sales.)

[tiberiade]

I feel like I lost a bit of ride quality by switching from the regular Race TLR to the RS version. Are others feeling the same? I feel like I get more vibrations from the road. My RS are also marginally wider somehow.

[Jaisen]

Is this going by their chart on the boxes? Apparently those were/are mis-printed.

Correct, it's been misprinted or changed at least twice. The "current" information is shown here: https://www.pirelli.com/tyres/en-gb/bik ... ace-tlr-rs

33.5-34mm on a 24mm rim seems about right on paper, though amusingly my 30-622 P Zero Race TLR RS tires are now 33mm at 73psi on 23mm hookless rims after 4500km. They're supposed to be 31mm iaccording to the size development chart.

Edit: Nvm, answer was posted on the following page (I should have read the entire thread). Thanks

Original: Did you happen to measure the tread width on the 30-622? BRR has the 28-622 at 30mm and the 32-622 at 35mm, I'm curious if the 30-622 is in between or shares the same tread width as one of the other sizes.

[TobinHatesYou]

Edit: Nvm, answer was posted on the following page (I should have read the entire thread). Thanks

Original: Did you happen to measure the tread width on the 30-622? BRR has the 28-622 at 30mm and the 32-622 at 35mm, I'm curious if the 30-622 is in between or shares the same tread width as one of the other sizes.

I don't see this. The 32-622 is in the CX/Gravel section where all the measurements seem to be done with an inflated tire on a 17.8mm rim. The measured width in this case was 30mm (with stretch and radiusing.) My own measurements on a folded tire had the tread at 32mm wide.

[Jaisen]

Edit: Nvm, answer was posted on the following page (I should have read the entire thread). Thanks

Original: Did you happen to measure the tread width on the 30-622? BRR has the 28-622 at 30mm and the 32-622 at 35mm, I'm curious if the 30-622 is in between or shares the same tread width as one of the other sizes.

I don't see this. The 32-622 is in the CX/Gravel section where all the measurements seem to be done with an inflated tire on a 17.8mm rim. The measured width in this case was 30mm (with stretch and radiusing.) My own measurements on a folded tire had the tread at 32mm wide.

Ya the gravel view is a bit weird on BRR, but if you happen to be a BRR member you can use Pro View that puts all the tire categories side by side. In any case my personal measurements have always been in line with yours, so thanks for always sharing the tread widths.

[panuelos]

How wide do 30mm tires blow on 25mm internal width rims?

[CJosephB]

For those wondering, what the Retro RS Colors look like. This should give a decent idea of what it looks like on my bike (Aethos - Sagan Edition).

Third brand tire, I've used in my adult cycling. (1) Continental GP5000S TR - Tanwall, (2) Vittoria Corsa Pro 2.0 and now this (3) Pirelli P-Zero Race TLR RS - Retro. All in 30mm wide.

Haven't riden it yet its relatively cold here. ~30 Degree C.