Goodyear UHP tubeless tires

[sethjs]

Ok I can't believe I have to ask this question. Trying to install the 25c F1 SuperSport Clinchers (weighed 192 btw) on a new set of FarSport wheels I just got. 21mm internal, 35 deep. Tubeless rim w/o spoke holes. DT180s and a whopping 1245 grams.

The problem - trying to install the clinchers with latex tubes (Vittoria 25/28) the tube is getting caught between the tire bead and the bead shelf. I can't seem to push it in. Even inflating / uninflating. Thoughts? So frustrating!

[AnkitS]

Try inflating the tube to ~10 psi so it holds it's shape better. What's the issue that is preventing you from pushing it under the tire bead? Is the tire too tight?

[sethjs]

So I tried inflating it a bit and then tried pushing it under the tire. Still wouldn't work! Basically a sliver of the tube was refusing to go under the tire bead. I even tried using a tire lever (gently) to get it pushed under.

Ultimate solution: baby powder. That "unstuck" the tube from in between the rim and the tire and got it all to center up.

Maybe it's those sticky Goodyears with sticky Latex on a sticky new rim?

[tonchy]

A friend of mine encountered a similar problem when fitting brand new Veloflex Corsa TLR 25mm on a brand new Fasports Kaze clincher rims; both front and rear.

[Tofast]

I received my eagle F1 tubeless complete 28mm tires today but both boxes says "crotchet rim only" but homepage says they support hookless as well. What is correct?

[Junior Varsity]

I received my eagle F1 tubeless complete 28mm tires today but both boxes says "crotchet rim only" but homepage says they support hookless as well. What is correct?

Our first batch of Tubeless Complete packaging was printed prior to final testing being completed with TSS rims. There is a running change in place.

[Hexsense]

I got my first piece of
Goodyear Eagle F1 Supersport 28c (clincher version).

What I clearly notice is this is really narrow 28c. In fact, this 28c has narrower casing than Continental GP5000 25c... So, any test of 25c vs 25c will put Goodyear at somewhat disadvantage.
In my case, to replace my Continental GP5000 25c front and 28c rear with Goodyear of the same width, it has to be 28c front and 30c rear.
(I might also do Supersport front, and regular version rear too).

Casing width of some comparable tires for reference :
Goodyear Eagle F1 Supersport 28c 65.5mm
Conti GP5000 25c 66mm
Conti GP5000 28c 71mm
Schwalbe Pro One Addix TLE 25 63.3mm
Schwalbe Pro One Addix TLE 28 68.5mm
Vittoria Corsa G2.0 25c 70.3mm
Vittoria Corsa G2.0 28c 72.4mm

[AnkitS]

Interesting. That's probably why Junior Varsity doesn't let us use 28mm tires on 25mm internal rims where other manufacturers are fine with it.

[TobinHatesYou]

What I noticed when I first installed my tires was they inflate into a "pointier" shape than most tires, like the GP4Ks did. They're taller, but narrower when inflated... The 25mm tires still inflated to around 26.4mm upon first inflation and are probably wider now. I'll check later...

[Junior Varsity]

Interesting. That's probably why Junior Varsity doesn't let us use 28mm tires on 25mm internal rims where other manufacturers are fine with it.

This is outlined in the forthcoming ISO 5775-1 standard and nothing to do with the measurement of a casing. There are many factors that influence a tire's width outside of a casing width such as bias angle, tension, materials, etc. Our 28mm (28-622) is based upon and optimized around a 19mm inner rim width. The 'Acceptable Tire/Rim Combinations" for a tire with a stated width of 28mm is 13-14mm to 24mm based upon those forthcoming standards. Other manufacturers are free to design around the inner rim they see fit.

I cannot speak to other manufacturers as I have 1, not seen them publish such information and 2, it would out of line for me to assume.

[Jackofallgrades]

So I tried inflating it a bit and then tried pushing it under the tire. Still wouldn't work! Basically a sliver of the tube was refusing to go under the tire bead. I even tried using a tire lever (gently) to get it pushed under.

Ultimate solution: baby powder. That "unstuck" the tube from in between the rim and the tire and got it all to center up.

Maybe it's those sticky Goodyears with sticky Latex on a sticky new rim?

I'm also looking at tyres for 21mm ID rims, how are the Supersports, and how wide do they come up? Looking at either these or P Zeros or Turbo Cottons...

[paulelana]

Put a 28mm 4 Seasons on Light Bicycle carbon rims with 21mm internal diameter this evening. At 64 psi they measure 29.2mm now but I'll measure them again in a day or two to see if they grow.

[Hexsense]

There are many factors that influence a tire's width outside of a casing width such as bias angle, tension, materials, etc

You are totally right,
Conti GP5000 25c with casing width of 66mm measure 28.5mm on the rim
But
Goodyear Eagle F1 Supersport 28c with casing width of 65.5mm measure 29.2mm on the rim

So, narrower casing width tire can measure wider on the rim than another tire with wider casing. Naturally, the thicker sidewall tire might measure slightly wider than the thinner sidewall one, along with many other factors.
Goodyear 28c is still clearly narrower than Continental GP5000 28c with casing width of 71mm which 31mm on the same rim though.
PS. rim in test is Light-Bicycle AR56, 23mm internal width (and 30mm external rim width).

[Junior Varsity]

There are many factors that influence a tire's width outside of a casing width such as bias angle, tension, materials, etc

You are totally right,
Conti GP5000 25c with casing width of 66mm measure 28.5mm on the rim
But
Goodyear Eagle F1 Supersport 28c with casing width of 65.5mm measure 29.2mm on the rim

So, narrower casing width tire can measure wider on the rim than another tire with wider casing. Naturally, the thicker sidewall tire might measure slightly wider than the thinner sidewall one, along with many other factors.
Goodyear 28c is still clearly narrower than Continental GP5000 28c with casing width of 71mm which 31mm on the same rim though.
PS. rim in test is Light-Bicycle AR56, 23mm internal width (and 30mm external rim width).

Re: sidewall thickness, it's actually the opposite of what you're proposing here. Bicycle tires are bias and will stretch a bit under inflation. A thinner sidewall will actually stretch a bit more than a thicker sidewall but this is just one factor along with the construction type (layers & materials etc.) and profile design. Our 25-622 and 28-622 tires (not 'c'), is designed to be those widths on a 19mm rim. Other companies may design around a different inner rim width.

[Hexsense]

Can you say what is likely to happen if we push the limit of tire width to rim width a bit over the official support list?
Say, 25mm Goodyear Eagle F1 Supersport tube-type on 23mm internal width rim.
Or 28mm Goodyear Eagle F1 Supersport tube-type on 25mm internal width rim.

I know it is not supported combination. Just curious of what you think will go wrong.