After reading reviews of the Vittoria's and the Veloflex tubbies I decided to try the Vittoria's but really don't like how they fit. When glued up there are quite a few areas where you can push the tire away from the rim. When the tires are dry mounted there is a small gap more or less all the way around the edge of the rim and tire.
The GP 4000's are seamless which must be why they were such a good fit where as the Vittoria's have the large seam in the middle and don't allow the sidewalls to come in full contact with the edge of the rim. Something else to note is the GP 4000's were also a perfect fit at the valve stem but the Vittoria's were incredible bad at the valve! I had to cut the base tape around the valve and make the valve hole in the rim way larger and it's still not a good fit.
Hard to say weather I should be concerned of rolling a tub? Frustrating as the 4000's were a perfect glue joint but the Vittoria's have a much better ride feel and can be opened up for patching.
Anyone have any experience with this issue or any advice? Would a pair of Veloflex tubbies fit any better? Would a wider tire maybe fit better?
Should I just glue them op or should I be looking at a different tire?
Rideuphill wrote:Can someone tell me if I should be concerned regarding how these tires fit my rims? Am I just over reacting or is this normal? I just had another look at them before gluing and there is a slight gap between tire and rim when dry fitting. With a minimal amount of thumb pressure you can push the tire away from the rim with 110psi.
At first I thought that photo was after gluing (in which case there would be a problem) but then re-read your dry fit comment. I don't see any issue and should be fine after glue.
I have two new Evo CX tires sitting here so I guess I will try them again. Really don't want to take a chance of rolling a tire!
With a good glue job there is no chance of rolling a tire but I understand your concern. You may notice that after some miles the tire may seat itself a little better as the stitched seam compresses.
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.
Mr.Gib wrote:I am guessing the Bontragers don't have a relief channel in the tire bed. My experience with Vittoria has all been on Zipp wheels which do have a relief channel so the tire settled down into the rim a bit more.
No, my Bonti's do not have any relief channel. Never knew that other wheels did! That definitely makes sense as the stitching on the tubular is exactly what is causing the problem.
So much to lean and discover on this forum!
Just so you know, this is a pretty common "problem" with Vittoria tubulars (plus all others made at the same factory) and actually one of the reasons why some rim manufactures adopted a different rim shape.
While I do not know the exact width of the Bontie rim I do believe you'd be better served by a slightly less wide tub without a protruding seam at the base tape.
Even though Veloflex now advertises their 22mm wide range of tubs as 23mm ones (they've always been a tad on the wide side of 22mm), they would fit well on that rim.
Whenever you get the chance you owe it to yourself to give them a try, especially with an Extreme on the front wheel and a Carbon on the rear (or their para sidewall versions).
You'd be surprise how much better they are than most other tubs.
I was really wanting to know if this was a common problem or if I was just making a big deal out of nothing. Definitely wont be buying the Evo CX for these wheels in the future. Believe me, from all your other posts you have me sold on the Veloflex, its just they cost 36% more when I already feel like I shouldn't be riding tubbies in the first place. Even if I have to ride my clinchers for a while I will save up for the Veloflex and give them a try.
My Bontie rims measure 22mm outside rim edge.
I felt exactly as you felt when you started this post. Though after I glued up my four tires I changed my mind about the Vittoria's. They are definitely a great tire and glue up easily as well. Granted my carbon tubular rims did have a relief channel. The lump of material around the bottom of the valve is normal, though on past versions on the evo cx tire they were smaller. Zipp's diameter for the valve hole on their rims are around 7mm, the size on the carbon rims I received were 6mm. I did enlarge the hole slightly to around 8mm... now here is the trick to get the valve hole seated perfectly, when you are ready to mount and glue the tire you must immediately stretch the two sides/sections right next to the valve while mounting. (grab the tire with the valve in the middle and stretch right away) Then continue to stretch and the lump shouldn't pose a problem.
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