Do I have room for 28 mm tires?

[echappist]

Edit as on Saturday Sept 12, see page three for photos with 28 mm tires.

Photos show how 25 mm Gatorskin tire on a 24 mm wide rim looks between the chainstays. It would seem that I might be able to do 28 mm (appears to have at least 3 mm on each side). Am I seeing things, or does it look possible? I'm thinking of using Vittoria Corsa G2.0 tires.

Thank you

Edit to add; d'oh, I'm a bit airheaded at the moment. Photos below. Please let me know if other photos or measurements might help.


https://dorj2a.by.files.1drv.com/y4mC4r1Gw9HtBeBxjKJkWikaxRkAK4VUVwyLg74_fsMCgSKiLC eUpSYGm41Mu-mWtjsplPFBwLo9wAf7KWneITWY_wPzQ1MTQBdUcJbqGOJeAa09 VAdCATGoUvaC0DqBpYE4J8hbz5TTqtduTfZN7FOCnZq48dguWK gAxqirrj6OciDbTxKAH7IOoaDOEfyvMbn-nXhwTbUnPLL2T-tX0CFgA?width=768&height=1024&cropmode=none

https://d18fqq.by.files.1drv.com/y4mOnLOxjUGdsD9uns1lhxjdqF2u-wosTFMtu0lVlKguApVDrh29mQNy9MVRTU2bOmGQlIkVnaMpwnQ HpGRzKwhAKeUTZ_vhVWJwUO0zwoJssjuORdxIoDStaHTA8HBZE QEgdiL_8FhSL-ojjMDWoDVuTiFYmdT2gXnhPwur1XB9a4DujWTvGdR45nq-0UcNV_dmnmQSvoo4aMhJ_TU72-beQ?width=768&height=1024&cropmode=none

https://dopiza.by.files.1drv.com/y4mwI_pggnb2n18TUsVXMqX4jQJVd-4NtUX3haYiQJ2dvjpxcXM-NxT8l4sTeK_sTVCv-aWlE7EWunhlNJMl2yNROisWnkiB7n0IpS8IqPCU4dcYt4Lbksq DKHVLPldVIACbg08s-Q7gxVmPf057EZ6X1uN62sQZduR9ATLeg7SY0S4bp0Fdj1MsTZ6 JmeHoSfl8GTyaYntLsM6Tva7_VJe0w?width=768&height=1024&cropmode=none

[apple]

Should there be photos?

[akelman]

Schrodinger's rims.

[echappist]

Should there be photos?
Of course there should. My oversight
Schrodinger's rims.

Well played :)

[zmalwo]

I don't think you do.

[mcteague]

Schrodinger's rims.

But, what about the cat? :confused:

Tim

[akelman]

I think you might be able to get the right 28s in there, yeah, but it's going to be tight enough that I probably wouldn't do it.

[apple]

It would be very, very close. I'm not sure. Gatorskins are typically thicker than normal, so maybe normal GP5000s would fit.

[mbrtool]

Based on what I see you have at best around 4.5mm/.18" clearance with 25mm tires. If you reduce that clearance by 1.5mm/.08", that seems pretty tight; but it might work. How about your brakes?

Ray

[echappist]

I'm agnostic to the brakes.

[akelman]

I'm agnostic to the brakes.

I think the question is, what's your clearance like at the brakes? Particularly the front?

[echappist]

I think the question is, what's your clearance like at the brakes? Particularly the front?

Truth be told, I don't know for certain.

Right now, it has Campy Chorus 11 brakes, but I won't be using that, if I'm keeping the frame. I have an 6800 Ultegra front that I could throw on or even a TriRig front (which has an arched opening). I could make the front work, if what I currently have don't work.

[kppolich]

Looks good to me, how the caliper bridge, assuming rim brake?

[echappist]

I think the question is, what's your clearance like at the brakes? Particularly the front?

Looks good to me, how the caliper bridge, assuming rim brake?

Come to think of it, you both raise good points.

Is there a brake that's particularly generous when it comes to clearance for larger sized tires?

[Spdntrxi]

another place to check is the seat tube clearance .. I recently put some Veloflex tubs in 27 (measure 26.2mm) on my moots so the chain stays are fine, but I have about a 1mm to the back of the seattube because they are so tall. I used tufo tape , which I think I'm going to pull off now and go with glue hoping to get ever mil of clearance I can get.

[Peter P.]

This is what I would do, and what I've actually done.

Go to your local bike shop and buy a 28mm tire with no intention of using it. Install the tire and check the clearances. Then return the tire, unused.

Perhaps buy a couple different brands if possible.

Keep your receipt!

[zmalwo]

3mm at the narrowest point is bad - add 1.5mm to your tires on each side you get 1.5mm clearance. That's almost touching, I think it will rub especially the frame is ti.

[kppolich]

Come to think of it, you both raise good points.

Is there a brake that's particularly generous when it comes to clearance for larger sized tires?

Newer SRAM Red Aerolinks or 8000/9000 series calipers have clearance for taller tires.

I just chucked some used GP5000TL 700x28s that you could have used for measurement purposes.

[homagesilkhope]

Spdntrxi mentioned seat tube clearance. In particular, interference with the front derailleur band/clamp can be an issue. Add that to the list.

[homagesilkhope]

This is what I would do, and what I've actually done.

Go to your local bike shop and buy a 28mm tire with no intention of using it. Install the tire and check the clearances. Then return the tire, unused.

Perhaps buy a couple different brands if possible.

Keep your receipt!

Well, that's one approach. Or how about this? Go to your local bike shop on/with your bike and say to the friendly folks there: Hey, I'm interested in trying 28's but am not sure if they'll fit. Can we give it a try? Of course, you'll have your tire levers with you.

[echappist]

Thanks everyone for the suggestions. I have another frame lined up if this one doesn't work. Was a bit surprised that there was what appeared to be large gap (~3 mm on each side, but I'm not sure if my reading is correct, alas the thread).

But you guys are right, even if I could get it to work, 1.5 mm clearance isn't a lot, all things considered.

Reason for wanting 28 mm tires is that some of the rural roads around here are bumpy as hell, more so than the rail-to-trails, alas, larger volume at lower pressure would be nice.

Newer SRAM Red Aerolinks or 8000/9000 series calipers have clearance for taller tires.

I just chucked some used GP5000TL 700x28s that you could have used for measurement purposes.

Thanks for the offer, but since I'll be using 28 mm regardless, I'll probably order some Vittoria G2.0 for testing. Unless, of course, if people think Panaracer might be better suited for my purpose

[osbk67]

What's the actual width of the "25mm" Gatorskins in the photograph?

[jpw]

What's the actual width of the "25mm" Gatorskins in the photograph?

Good question.

[tuscanyswe]

I wouldent put a 28 in that but ppl are different .)

Had a situation on a bike and had and decided to fit a slightly larger tire and if the wheel wasent perfectly true or you had a an issue during the ride tire would rub. And also depending on the stiffness of the frame it may rub even if 100% straight.

On my bike u could actually feel the tire had made a mark from grinding on the chainstays without me noticing while riding.

[echappist]

What's the actual width of the "25mm" Gatorskins in the photograph?

No clue. I have a caliper incoming, but that won't do much good until then.

I wouldent put a 28 in that but ppl are different .)

Had a situation on a bike and had and decided to fit a slightly larger tire and if the wheel wasent perfectly true or you had a an issue during the ride tire would rub. And also depending on the stiffness of the frame it may rub even if 100% straight.

On my bike u could actually feel the tire had made a mark from grinding on the chainstays without me noticing while riding.

Good points

-------------------------------------------------------------------------------------

Also, opinions on Gravel King 28 mm vs Corsa G2.0 28 mm tires?

[cgates66]

Good news and bad news.

Bad news first: you probably can't run 28s. You're pretty tight right now with a fairly thin 25 (Gatorskin).

Good news: you don't need to run 28s! You're running Gatorskins, probably the worst road tire I've ever ridden (worst: least comfortable, slowest, only marginally more durable than GP4000s). You can get 28-like performance by simply moving to a much better 25, like a GP5000 if you like Continental. Or if you want to run a "not quite a 28", get a 25c GP4000 (they measure out 27 or so on medium-wide rims). Durability is close, and you'll immediately feel like you're on a magic carpet. I'm not kidding, I went from Gatorskins to a good tire a while back and now never miss the opportunity to cast aspersions on those things.

[cgates66]

I wouldent put a 28 in that but ppl are different .)

Had a situation on a bike and had and decided to fit a slightly larger tire and if the wheel wasent perfectly true or you had a an issue during the ride tire would rub. And also depending on the stiffness of the frame it may rub even if 100% straight.

On my bike u could actually feel the tire had made a mark from grinding on the chainstays without me noticing while riding.

Worth mentioning that wheel stiffness matters here also, maybe more than frame stiffness (think of the chain pulling on the sprocket and bending the wheel - more likely than bending the frame I think but I could be wrong on the relative deflection potential).

[tuscanyswe]

Worth mentioning that wheel stiffness matters here also, maybe more than frame stiffness (think of the chain pulling on the sprocket and bending the wheel - more likely than bending the frame I think but I could be wrong on the relative deflection potential).

Ah but ofcourse that is much more likely what happend.

[mhespenheide]

Good news and bad news.

Bad news first: you probably can't run 28s. You're pretty tight right now with a fairly thin 25 (Gatorskin).

Good news: you don't need to run 28s! You're running Gatorskins, probably the worst road tire I've ever ridden (worst: least comfortable, slowest, only marginally more durable than GP4000s). You can get 28-like performance by simply moving to a much better 25, like a GP5000 if you like Continental. Or if you want to run a "not quite a 28", get a 25c GP4000 (they measure out 27 or so on medium-wide rims). Durability is close, and you'll immediately feel like you're on a magic carpet. I'm not kidding, I went from Gatorskins to a good tire a while back and now never miss the opportunity to cast aspersions on those things.

True.

[merlinmurph]

Curious minds want to know: What's the frame?

[echappist]

Seven Axiom

[Kirk007]

Jan Heine recommends a minimum of 3mm at closest point. I recently researched this and this was a fairly common recommendation.

[cribbit]

Is it bad that I knew it was a Seven just from the photo? I should ride more and ogle less...

I run as little as 1-2mm clearance on the vertical, but would be leery going that little on the horizontal. You'll get rub.

[echappist]

Is it bad that I knew it was a Seven just from the photo? I should ride more and ogle less...

I run as little as 1-2mm clearance on the vertical, but would be leery going that little on the horizontal. You'll get rub.

Wealth of knowledge in one's hobby is what makes this forum great :)

[merlinmurph]

Seven Axiom

Being a Seven owner and looking at the BB, my guess was a Seven something.

[jtbadge]

I bet you could fit a 26c GravelKing. 28c anything is probably out.

[Waldo62]

No, but go with a 26 that has more supple casing and you'll get significant improvement in ride quality, if not from the increased volume, then from a better riding tire.

[jpw]

Vittoria Corsa 27.

[echappist]

I got some 28 mm tires yesterday and got around to mounting them today.

There seems to be about a good 2 mm on each side when using Vittoria Corsa G2.0 (see below) and almost 3 mm on each side when using Continental GP 5000. In view of that, would this be a pretty good bet that I can run 28 mm tires?

I guess the only down side is that the rear wheel would have to stay quite true, but this particular one was built by Signore Potata Vecchio, so I have more faith in it.

https://crjazw.by.files.1drv.com/y4muGUlCZHYT7MA2WQq9-myAzYz-8x87s5W54ndrDhsIFREwQ9jn9iWB3ckCiHm6jYx516L21_UT_w GKSDGfE1odqJWHkhs9CdzVfYKjxoIwxWcvLQ_rDZrY3oSfhWd7-t1zWLL83pT-WNSsp7h3c4jNM8DdGkSaD6uhroyPolEes98LNhoIIWGMPFTtl-ENfsnZJxG9hl5aGl-IE6oFyqqqw?width=768&height=1024&cropmode=none

https://crhgbw.by.files.1drv.com/y4m-QYlwD-0KGbYOJ_g_2oa7fUV46GnxkXPTBBzNmJmynDSJsq5ql_nKLdkt j4l9TDCUm6Qk8Hgxl9-QEFVl6zM5SqMyy46FL8ocBmXRYpBCHAYhGuQ9Bjbbr02E48_0N EddwXcfjIm9I2aTO4-qk_T7V4CRN5WO26Y55SiW7ZTiH7prb_1p8_3tGJ6rti5kMC4lR bdCmbP22bR6IE0nO46rQ?width=495&height=660&cropmode=none

https://bqpbla.by.files.1drv.com/y4mJwKe8bkFyHNz_YYC-FQEy3UKLXJSDDTLgw4uAHjv5XGCWF460ZNYbUai9pg00iBZhem sjf5jVNXrs6mKKE2l5DuuDMFJss0YqluWkzFE2Iu3fKwbenH9t yS4xk5y7uoMBjsje2b-nTpIxPxIN-MEztLSHNkdmHwjBdnXupkINo4wSL-dxYNyM1qw0fh22lreAaP3fkPyRgoTPeZYK8DUIg?width=495&height=660&cropmode=none

[Clean39T]

If you do, put some 3M helicopter tape inside the stays so you can monitor after a couple rides if it's rubbing when standing. Wearing through the titanium over time wouldn't be fun..

[echappist]

Thanks, that's a great idea.

[ridethecliche]

Dimple the stays

😁😁😁

[jtbadge]

Not bad! Keep an eye on if the tires stretch after being mounted/ridden a while.

[Hilltopperny]

One other thing of note is that tires can expand from use and temperature. You will have to give it a little time to see how that plays out.

I found with too little clearance if you get caught in inclement weather you may find some premature wear. I had 48mm Gravel King SKs on for The Farmer’s Daughter last year and realized later that I wore off some of the carbon on my fork from mud, debris and overall rubbing.

The bike being titanium shouldn’t be too susceptible, but you may want to make sure the fork has a bit more room.


Sent from my iPhone using Tapatalk

[Ralph]

I always think about "can I ride home with a broken spoke?"

[weisan]

you'll be fine. A lot of "aero" carbon bikes have clearance even less than that and people been riding them forever without saying anything.