CrowSeph

Hello guys!
I've checked a lot of tyres but the choice is hard, so i'm here asking for the pros to help me

Details:

• my weight is 63-65kg
• used for both training and racing
• clinchers type

What i need:

• 28mm tyre
• no limits of lower pressure since i had to run at 5psi with tpu tubes.
• cost around 40€ per tyre... ofc less is better
• BONUS POINTS: if the weight is around 220g

Iride01 

5 PSI or 5 bar?

aliasfox

It seems like a lot of people like the Continental GP5000, which seems to have a good balance of grip, rolling resistance, and longevity, so it works as a training tire. For higher performance and cost, I’ve heard the Vittoria Corsa’s good. I’ve ridden the Continental GP4000 SII and the GP5000, and think they’re fine. I’ve ridden lower end Vittorias (Rubinos and Zaffiros) and generally found them grippy, but they definitely wore more quickly. Psychologically, the Contis seem to roll faster, but without measurement I can’t really back that up.

TL;DR: racing specific tire - Vittoria Corsa; all around tire - Continental GP5000.

CrowSeph

LOL... 5 bar i mean

CrowSeph

i'am running the rubino and they are very good except they request a minimum of 7bar. a bit too much for a small rider

79pmooney

I would put littleweight on the manufacturer's minimum pressure. Minimum pressure is dictated by the need to keep the rims off the pavement and prevent the tire from rolling or coming off the rim on hard corners. The lighter you are, the lower that pressure is going to be. Another consideration, better tires can be ridden with more pressure comfortably because of the thinner and more flexy sidewalls. (That high minimum - Vittoria's legal crew don't want 90 kg riders coming after them.)

Iride01 

7 bar is just over 101 psi. Are you certain that isn't the max pressure? Or are you on a 18 mm wide tire?

I looked at Vittoria's website and it seems they don't even disclose what the maximum or minimum pressures are for their different sizes and models of tires.

Bar also doesn't give me enough precision for filling my tires. I'd be looking down to the second decimal place as I keep my tires within 0.07 - 0.14 bar or roughly 1.0 - 2.0 psi of the pressure I like to keep them at for riding.

marathon marke

I'm not sure I agree with your comparison of Vitorria Corsa vs Continental GP5000.
I've been riding the Contis for several years, and I've been pretty impressed with the tire. I recently picked up some of the Vitorrias because of a good price. But they feel slower.
This seems to confirm that:
https://www.bicyclerollingresistance...orsa-graphene2

aliasfox

I’ve had shops recommend the Corsa as a high performance tire, and I know it’s used in the pro peloton. I’ve never used it, so I only have bicyclerollingresistance.com and anecdotal evidence like above to go by. Just decided to pass that info along.

I have the GP5k on two of my bikes, and while I miss the grippiness of the Rubinos, I don’t miss the sluggishness or the magical ability for them to square off in the first thousand miles of lugging my lard butt around.

For a good budget tire, I really like the Conti Ultra Sport 2. No puncture belt, but seems to roll nearly as well as the GP5k. It’s been on one front wheel for 4k miles, and you can barely tell it’s been worn. And pretty grippy, too. Don’t know if the current Ultra Sport 3 is comparable.

Sy Reene

I can't speak to Rubinos or in 28s, but Vittoria has always been an outlier for how they actually mark their tires. These are 25mm Corsa Controls:

CrowSeph

same tyre, but somehow mine has a different design.
so, i'am correct that the correct pressure is from 7 to 9 bar?

mstateglfr 

Continental GP5k. The tube type. You want something for $44usd and that tire comes in right at that amount if you look around. I have no idea what it costs in Italy or Europe when delivered to Italy. The black version weighs 240g.
And it comes in black, cream, and tan sidewalls.
**the same tire comes in a few different versions so dont think the TR or other versions are what you need- those cost more.

https://bikecloset.com/product/conti...xoCm5gQAvD_BwE
https://www.amazon.com/Grand-Prix-Bl...=1&psc=1&qty=2

kraftwerk 

In Italy Vittoria's just ,make so much sense. I weigh 64 Kg also, currently running a mix matched set:
Continental GrandPrix 5000 ( rear ) and a Mavic SSC ( in front ) < time to change it!

chaadster

I’d recommend the new Michelin Power Cup 28 which weighs in at 227g.

It’s a full-on racing tire, but without going silly thin on the tread, so it’s suitable for daily riding.

It’s the evolution of the Power Road, which I used but was not really impressed with. It was fine and I never had any performance issues, but I never really developed confidence in them in terms of grip, I guess because they felt vague. They also got harsh at higher pressure— +90psi range— which was noticeable compared to the Schwalbe Pro One, my all-time favorite tire in terms of feel and performance. Tread cut nightmares there for awhile, though, the P1.

Michelin corrected all that with the Power Cup…at least for tubeless, which are the tires I’m referencing. Coming off my club’s season opener camp down in Bloomington, IN this past weekend, where it was rainy and cold, the Power Cup proved its mettle. Wet, downhill braking and cornering was very good, and the feel raised no doubts. Rainy, early spring roads are typically full of debris, but the Power Cups did not get beat up. I took one small puncture, apparently, but it sealed immediately without me even being aware until the post-ride cleaning, when I saw a little sealant spray on the seat tube. I’m running 25s at mid-80s psi, and they deliver good ride comfort.

Check out LordGun up in Brescia, who had good prices on Power Cup recently, in the $37USD range. With domestic Italian shipping, they might be in the €40s range, maybe creeping into the low €50s…dunno. I paid $75 apiece for mine, so I think LordGun’s pricing is amazing. The Michelins are always hard to find, it seems, and you know how it goes: when you want tires you usually need them, so I just grabbed them for whomever had ‘em.

tempocyclist

Training AND racing: Continental GP5000 or Pirelli P-Zero Race

Racing only: Vittoria Corsa Speed TLR 2.0 (you could train on them if your roads are smooth and your pockets are deep)

bampilot06

I Race GP4000 and GP5000. Like them both.

ctak

I run 28mm gp5s with vittoria latex for racing and training - have had only a single flat in the last 14k miles with this combo. knock on wood! Latex tubes will improve rolling resistance by 3-5w per tire over butyl for gp5s (ime). I'm also religious about replacing the rear every 2k miles and front every 4k, and checking for tiny glass shards weekly (use super glue to fill in crevices).

CrowSeph

TPU tubes are meant to be used at max of 5bar. do you think is a problem to have a specific tyre meant for min of 7bar with those tpu tubes at 5bar?

chaadster

Huh? It’s hard to understand why there’d be a pressure max on TPU tubes, not to mention that not all TPU is the same. Do you have a reference for that?

tFUnK

With respect to the 7 bar minimum pressure for the Rubinos, you can definitely safely run them lower. Take your rider+bike system weight and run it through a calculator to get the ballpark of what you should run.

With respect to running higher than 5 bar on TPU tubes, I definitely run mine around 6-7 bar on a regular basis without issues.

With respect to Conti GP and Vittoria Corsa tires, I found the Corsas to be more supple with a smoother ride, but the GPs (I've only ridden GP4Ks) felt nearly as smooth and they feel faster and more responsive (all subjective). Neither feel super durable but then again I've also not gotten too many flats with either.

CrowSeph

ridenow race formula

chaadster

I wonder if you might be confusing their warning about what they call "vacant inflation," "vacancy pumping," and "empty play," all of which refer to limited inflation pressure when not installed in a tire, with maximum pressure while in use (i.e. installed in tire).

Ridenow-- at least in Amazon offering pages; I didn't see anything on ridenowtech.com-- advise variously not to inflate past 5psi or 6psi when not not installed because the tube can bubble and permanently deform. I see no warnings or limit for maximum pressure when installed.

CrowSeph

I think i misread, the instruction (here https://i.ibb.co/3BkFzhV/1682772903708-1.jpg) say do not over inflate over 5bar in case of the no-ring-lip system... what that mean? hookless rim?

chaadster

Yes, 5bar is 72psi, the ISO inflation pressure limit for hookless rims. "No-ring-lip" seems like novel phrasing for hookless, so perhaps it's more technically accurate or a language translation issue.

CrowSeph

ohh. so i have no problem regarding my 6.5 bar