Wide Rims and Tires: Real Measurements

Everything about building wheels, glueing tubs, etc.
pavel
Posts: 72
Joined: Mon Jan 04, 2016 12:03 am

by pavel

Velocity A23:
Michelin Pro4 25: 28.16
Michelin Pro4 Endurance 28: 30.xx

BigPoser
Posts: 125
Joined: Tue Oct 21, 2014 11:42 pm

by BigPoser

I wish I would have seen this post before starting my own on the subject. I'm currently in the market for some new tires and want to get some Conti GP4000s II in a 25mm to replace my Michelin Pro SC 23mm. Here's my dilemma: One of my bikes has Kinlin XR19W rims and the other has H+Son and I will swap wheels when desired.

My issue is that my Focus has a tighter clearance, on the rear only (about a 1-2mm or so) which is why I'm using the Mich SC 23mm tires. I want to know if I will still have clearance issues with the GP 25mm tires. Sometime later this year I might end up getting new wheels (Pacenti or similar) and also need to know if I'm continue to have issues with the new hoops since they will be wider than my Kinlins.

The width of my 23mm SC tires on my Kinlin rims are 24.68mm. With this set up I have 4.63mm of clearance on my NDS chainstay.
I also measured the width of my Michelin SC 25mm tires that are mounted on H+Son Archetype rims on my other bike and they measured 26.73mm.

Based on those numbers, I would have approx 2.5mm of clearance using the Mich 25mm, however that is using a different rim.

Anyone know if I'll be able to fit the 25mm Conti's?

Thanks in advance.

Brandon

by Weenie


bm0p700f
in the industry
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by bm0p700f

Challange strada Bianca 30mm (65psi) on velocity Aileron =31mm.
vittoria Pave 27mm (90 psi) on H Plus Archetype =27mm
Vittoria Pave 27mm (90psi) on Kinlin XR200 =25mm
Vittoria Corsa SC 23mm (100psi) on my 25mm wide carbon rims (19mm internal width) =25mm spot on.

Pressure has hardly any affect on width once the tyre is inflated and has it's shape. I have rounded down by 0.1 or 0.2mm in some cases.

My Sannino runs with 1mm of clearance to the seat tube. That is fine. My Genesis equilibrium with the chamllange tyres has very little clearance at the stays but again no rub. So if it clear and the wheel is straight then there wont be a problem. Do you have confidence in your wheels?

lactatehate
Posts: 135
Joined: Mon Aug 23, 2004 12:50 pm
Location: UK

by lactatehate

TIRE WIDTHS
sorted by *actual* width (with vernier gauge) & psi digital gauge checked.

In the next month I hope to add to list....
1) Vittoria Corsa Speed 23mm Graphene
2) Zipp Tangente Speed 25mm
3) Conti Force/Attack (again on SL23)
4) Specialized Turbo Cotton 26mm
5) Clement LCV 25mm


Pacenti SL23 ’15 Rim = 20.3mm inside track width

Vittoria Corsa CX 23mm:
Front 26.6mm 95psi

Vittoria Pave III 25mm:
Front 27mm 94psi

Specialized Roubaix Pro 25/28mm:
Front 29.5mm 95psi

Conti GP4000 SII Reflex 25mm:
Front 28.5mm 95psi

Kenda Karv (CX) 28mm:
Front 28.5mm 94psi



HED Belgium Plus Rim = 20.6mm inside track width:

Vittoria Diamante Radiale 22mm:
Front 24.6mm 95psi

Panaracer Gravel King 23mm:
Rear 25.6mm 95psi

Specialized Turbo Cotton 24mm:
Front 26.6mm 95psi

Vittoria Corsa CX 23mm:
Front 26.6mm 93psi

Specialized Roubaix Pro 23/25mm:
Front 27.1mm 95psi

Conti GP4000 SII 23mm:
Front 27.2mm 94psi

Vittoria Pave III 25mm:
Front 27.2mm 95psi

Panaracer Gravel King 26mm:
Front 27.7mm 95psi

Conti GP4000 SII 25mm:
Front 28.6mm 95psi

Specialized Roubaix Pro 25/28mm:
Front 29.5mm 95psi

Clement LGG Strada 28mm:
Front 30mm 94psi

Challenge Parigi-Roubaix 27mm:
Front 31mm 93psi

Challenge Strada Bianca 30mm:
Front 32.5mm 94psi




Flo 30 rim = 19.3mm inside track width: 

Panaracer Gravel King 23mm:
Front 24.3mm 93psi

Conti GP Attack 22mm:
Rear 24.5mm 95psi

Conti GP4000 SII 23mm:
Front 25.3mm 93psi

Specialized Turbo Cotton 24mm:
Front 25.5mm 95psi

Specialized Roubaix Pro 23/25mm:
Front 25.7mm 95psi

Vittoria Pave III 25mm:
Rear 26.1mm 95psi

Conti GP Force 24mm:
Rear 26.7mm 94psi

Conti GP4000 SII 25mm:
Front 27.7mm 93psi
Rear 27.5mm 95psi

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Tomstr
Posts: 572
Joined: Tue Oct 04, 2011 5:04 pm

by Tomstr

Very interesting tread.

What minimum amount of tyre clearance do you guys recommend? I've read about 3mm on all sides on Jan Heine's blog which seems to make sense. But I'd like some more opinions before I get the 28mm Pro4's.
Ride it like you stole it

Birdman
Posts: 281
Joined: Mon Aug 17, 2015 4:03 pm
Location: Chicago, IL, USA

by Birdman

3mm should be fine (boarder line) if you only ride nice paved roads. I removed a layer of clear coat under the rear brake bridge on my Domane. I had less clearance than you though.

Tomstr wrote:Very interesting tread.

What minimum amount of tyre clearance do you guys recommend? I've read about 3mm on all sides on Jan Heine's blog which seems to make sense. But I'd like some more opinions before I get the 28mm Pro4's.
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CrankAddictsRich
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by CrankAddictsRich

Yoeleo 50x25mm wide SAT Superlight wheels

SWorks Turbo 24's at 100psi measure 25.5mm
SWorks Turbo 26's at 95psi measure 27.25mm
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spartan
Posts: 1165
Joined: Fri Sep 03, 2004 2:52 am

by spartan

does anyone find changing tires on ultra wide inner rim(internal width > 19mm) is difficult

i have two pairs of bonty aelous carbon rims.

1st gen internal width is 17mm.. no issue install/remove tires
2nd gen internal width is 19mm.. designes for tubeless tires. i have to use two tire levers to unseat the tire for removal.

i use conti gp25 on both wheelsets.
Current Rides:

2017 Giant TCR Advanced SL 0 DI2 9150

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grid256
Posts: 364
Joined: Tue Dec 15, 2009 8:32 pm

by grid256

This is very valuable and confirms my measurements with the newer Hed + rims. Now we just need frames to clear these things :)

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F45
Posts: 895
Joined: Wed Jun 08, 2011 6:08 am

by F45

28mm Conti GP4000SII on 18mm internal at 85psi - 30.5mm
28mm S works turbo on 18mm internal at 85psi - 28mm
26mm S works turbo at 80 psi - 26mm

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wheelsONfire
Posts: 1948
Joined: Mon Jul 07, 2014 8:15 am
Location: NorthEU

by wheelsONfire

Looking at clearance to frame, 3mm seems really low. Even for a road bike.
I would expect rub is going to happen with that narrow play.
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Tomstr
Posts: 572
Joined: Tue Oct 04, 2011 5:04 pm

by Tomstr

On a road bike it's fine, I once ripped the nipple out(28 spoke wheel) on a hole in the road that I overlooked and finished the event without hassle. On a crossbike or anything that sees mud it's asking for trouble. With low spoke counts and high tensioned spokes I can imagine this could go wrong too.
Ride it like you stole it

PrimO
Posts: 72
Joined: Thu Nov 20, 2014 8:49 pm

by PrimO

Fulcrum Quattro Carbon (17mm internal) - 25mm GP4000SII = 26.7mm @ 90psi.

fignonsbarber
Posts: 136
Joined: Fri Jun 25, 2010 10:24 pm

by fignonsbarber

New Campagnolo Shamal Ultra C17 with Vittoria Corsa Graphene+ 25mm clincher @95psi:
front: 26.94mm
rear: 26.96mm

by Weenie


Bodo
Posts: 5
Joined: Sun May 02, 2010 11:37 am
Location: Germany

by Bodo

H Plus Son Archetype @ 90 psi

Veloflex Corsa 25 = 25,2 mm
Conti GP 25 = 26,2 mm
Conti GP GT 25 = 26,6 mm

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