Specialized Turbo Cotton Tires - Width Question..

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Mocs123
Posts: 894
Joined: Tue May 11, 2021 9:19 pm

by Mocs123

I've been an avid Continental GP5000 fan but am thinking about trying a set of Turbo Cottons (with latex tubes). I'm trying to decide which size to buy. My wheels are 23mm internal and 30mm external, and I've been using 25c tires - that end up measuring 29mm on the wider rims. Does anyone have real world width measurements for Turbo Cotton's on a 23mm rim?
2015 Wilier Zero.7 Rim - 6.37kg
2020 Trek Emonda SLR-7 Disc - 6.86kg
2023 Specialized SL7 - 7.18kg

by Weenie


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RyanH
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by RyanH

Not exactly what you're asking but if I recall correctly 25mm TC on 21mm internal measured out to just under 27mm while 28mm measured out to 30mm on the same rim.

Mocs123
Posts: 894
Joined: Tue May 11, 2021 9:19 pm

by Mocs123

Turbo Cotton's are sold in 24c, 26c, and 28c (as Hell of the North) I beleive. When you say "25mm TC on 21mm internal" do you mean 26c?
2015 Wilier Zero.7 Rim - 6.37kg
2020 Trek Emonda SLR-7 Disc - 6.86kg
2023 Specialized SL7 - 7.18kg

frostorama
Posts: 91
Joined: Mon Jun 10, 2019 8:29 pm

by frostorama

My 26mm Turbo Cotton on Alpinist CLX (21mm internal) measure 28mm at 65psi.

Mocs123
Posts: 894
Joined: Tue May 11, 2021 9:19 pm

by Mocs123

Thanks. It sounds like the 26c might be the tire I'm looking for if I want the tire to be 29mm on my 23mm inner rims.
2015 Wilier Zero.7 Rim - 6.37kg
2020 Trek Emonda SLR-7 Disc - 6.86kg
2023 Specialized SL7 - 7.18kg

timmerrr
Posts: 229
Joined: Wed Sep 26, 2018 10:09 pm

by timmerrr

Mocs123 wrote:
Sat Sep 10, 2022 8:01 pm
Thanks. It sounds like the 26c might be the tire I'm looking for if I want the tire to be 29mm on my 23mm inner rims.
I ran 26c turbo cottons on LB AR56s (the rim I assume you are using) and they came out to almost exactly 29mm.
State Bicycle Co. Undefeated: viewtopic.php?f=10&t=171358

Mocs123
Posts: 894
Joined: Tue May 11, 2021 9:19 pm

by Mocs123

That is correct, that is the rim I've got. Any feedback on the combo? And thank you for your input!
2015 Wilier Zero.7 Rim - 6.37kg
2020 Trek Emonda SLR-7 Disc - 6.86kg
2023 Specialized SL7 - 7.18kg

timmerrr
Posts: 229
Joined: Wed Sep 26, 2018 10:09 pm

by timmerrr

Great combo, raced and won quite a few crits on it. I have moved on to Veloflex tires as they are cheaper but have the same great ride quality as the turbo cottons.
State Bicycle Co. Undefeated: viewtopic.php?f=10&t=171358

spib
Posts: 25
Joined: Tue Jan 11, 2022 6:51 pm

by spib

TC + latex is easily the best tire setup I've tried as well. I recently tried Vittoria corsa + latex and hands down prefer the cottons.

andy4g63
Posts: 234
Joined: Wed Mar 18, 2020 7:02 pm

by andy4g63

Mocs123 wrote:
Fri Sep 09, 2022 8:33 pm
I've been an avid Continental GP5000 fan but am thinking about trying a set of Turbo Cottons (with latex tubes). I'm trying to decide which size to buy. My wheels are 23mm internal and 30mm external, and I've been using 25c tires - that end up measuring 29mm on the wider rims. Does anyone have real world width measurements for Turbo Cotton's on a 23mm rim?
I have the exact same setup.
Running LB's AR56 which are 23/30 and700x28 Turbo cottons...and latex tubes.

Being that the turbo cottons are running only a 1mm above their stayed width, when new, 28mm on a 23/30 rims would go around 29.5mm, almost perfect, considering the 105 rule.

I also recall that my LB rims were about 30.5 mm wide.

So even now after months and months of use, the rims are wider, than tires.

And I run like 48-50 psi-F and 57-60 psi-R and I weigh 72kg..

Unless you are going for absolute speed, the 28's are the best

Torbjorn
Posts: 221
Joined: Mon Feb 12, 2018 2:44 pm

by Torbjorn

Do the Turbo Cottons exist in 28c? I didn't think it did and I can't find it anywhere, but there's some conflicting information out there, such as the descriptive text here: https://www.specialized.com/ch/en/turbo ... 084-171815
700 x 24mm, psi 115-125, approximate weight 220g
700 x 26mm, psi 95-115, approximate weight 240g
700 x 28mm, psi 85-95, approximate weight 260g

seventyseven
Posts: 51
Joined: Thu Sep 22, 2022 11:49 pm

by seventyseven

Yes they are referred to as "Hell of The North": https://www.specialized.com/ch/en/turbo ... 00018-1508

Shadco
Posts: 22
Joined: Fri Jun 30, 2023 1:25 pm

by Shadco

Hell of the north's on 21mm internal shamals come out 29 w/tpu tubes 70psi.

.

micmax
Posts: 34
Joined: Sat May 07, 2011 7:57 am

by micmax

My 26mm Turbo Cotton on C38 (21mm internal) measure 29mm at 6 bar.

by Weenie


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frostorama
Posts: 91
Joined: Mon Jun 10, 2019 8:29 pm

by frostorama

An update to my earlier post. I have now moved onto 28mm Turbo Cottons (marketed as Hell of the North) on my Alpinist CLX's with 21mm rims. Infated to 60psi the 28mm TC's measure just under 30mm. I'm still running latex tubes and the ride is sublime.

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