Best options for 28mm tires on the Vendetta?

RojoRacing

RojoRacing

Donut Powered Wise-guy
So I'm in the final stretch before my 24hr race on the Vendetta and I'm trying to figure out the tire situation. I'm currently riding the stock wheels with 25mm panaracer tires and although these may be more comfortable then some 21 or 23mm tires I believe there's still room for improvement. I'm hearing the fork clearance can be uncomfortably tight with some 28mm tires but the rear seems to have lots of room. I figure I'll order one 28 for the rear but try it one the front first. If the 28 is too tight on the front then I'll go 25f 28r which is probably a good balance between weight and comfort anyways.

Now with the new style of carbon aero wheel being extra wide and designed for 25-28mm tires I'm wondering how well a 28mm would perform on a narrow wheel like the CruzBike wheels? I may have a line on a borrowed disk for the back of the bike and I have a few friends with high end tri bikes that I could probably borrow a 60-80mm drive wheel from for the front.

So for a 24hr race what 25-28mm brand and model tires would you guys recommend and why?
 
trplay

trplay

Zen MBB Master
Before jumping on the wide tire bandwagon with those wider wheels make sure you know how wide those tires actually are on that wheel set as opposed to going by the number on the tire. My Schwalbe One 23mm are actually 25+mm on my flo 30 wheel set. The 25mm Schwalbe Ones are 27+ (almost 28mm) on the same wheelset. Go for matching tire and wheel width for aero. For instance Conti GP2s 23mm match my Flo wheel the best.
 
RojoRacing

RojoRacing

Donut Powered Wise-guy
And that's exactly why I'm asking the questions. So how wide is the internal width of your Flo30 wheels that your achieving those tire numbers. You never said how wide your 23mm Conti's are on your flo wheels. I don't know the specs of the disk wheel I may or may not be trying are but if I can gather a few numbers from you guys before hand then if I do get my hands on it I'll be able to narrow down my choices quickly.

When it comes to Mtb tires I have lots of data and measurements and depending on the course I can choose a good tire but I have no idea when it comes to road tires.

I'm more interested in smoothness and comfort factor of taller/wider tires because desert roads aren't know for their smooth surfaces. Aerodynamics is important for a TT but comfort comes first when going 24hrs strait.
 
DavidCH

DavidCH

In thought; expanding the paradigm of traversity
I am running with 28mm front and rear. They are the Compass Chinook Pass, I have less than 3mm to spare at the top of front wheel. From the rim to the top of the tyre is 26mm and obviously 28mm wide. My less than 3mm space is between the front brake calliper and the tyre. I have them pumped to 90psi so if you wanted more then it might be of issue.

I love the caminos here in Spain. No cars... private roads that tractors use so they are tarmac but bumpy here and there so I like the 28mm tyres. I do use roads as well and if there is a chance to overtake a roadie I take it.

The brakes I use are from the Shimano ultegra 6800 groupset.

Hope that helps
 
trplay

trplay

Zen MBB Master
I measured the Flo 30's wheel outside width at 25.98mm. The schwalbe tire is at 27.2mm. I can't remember the inside width and can't measure it. The Flo 90's outside measurement is 24.4 and the Conti tire measures at 24.6mm.
The issue of comfort always interests me. To me, the difference in comfort between these two sets of tires is not an earth shaking amount if any. However, according to the experts (certainly not me) the aero difference in a wind tunnels is a lot. Your goal of 500 miles over 24 hours puts your average over 20 mph. IMO An aero set of tires vs a dirty set of wheels will have a major impact on the success of your ride while the slight "comfort" difference will not.
 
1happyreader

1happyreader

zen/child method
Rick Youngblood

Rick Youngblood

CarbonCraft Master
Rojo

I'm running Schwable One Clincher 28mm on both front and back - I own the Yellow V2 - It's my understanding the newer V20 has a little more clearance for 28mm - Love these tires - However, I filed off a little materiel from the front fork under-crown to get comfortable with clearance - I'm comfortable now :D! My rims are the old narrow style road wheel.

Amazon: http://www.amazon.com/SCHWALBE-Fold...8&qid=1445439062&sr=8-1&keywords=Schwalbe+one
 
Itripper

Itripper

Active Member
I tried 28 mm gp4000 front and rear. The front barely touches fork on brake side. I ended up putting a 25 on the front for now. I am sure 30 seconds with a Dremel would fix it for 28. I noticed a large gain in comfort on rough chipseal road. I had a narrow rim before and the 28 was way too big for the front at that time; putting a wider room have have a lot more clearance b bit still not enough.
 
LarryOz

LarryOz

Cruzeum Curator & Sigma Wrangler
I am running Conti 4000 SII 23's on my front (do not know what the clearance is: can measure when I get home), and Conti 25's on the rear. I rode 24 hours at Sebring on this setup with 100 psi and did not have any comfort issues. But then, I also just used the stock headrest too, so I may not be a good benchmark for you! :)
 
ratz

ratz

Wielder of the Rubber Mallet
Ugh that ones hard on short notice. The A67 Wheelset (Robert will clarify I'm sure) I believe a Traditional 15 or 17mm internal rim width (irw)

Rojo you can obviously measure that real fast and check; I don't have that wheels set or I would.

So without a lot of effort if you are running tubes then a Conti 4000Sii with a latex tube will be about the best you can get; anything that might be better with a tube will be hairsplitting and hard to track down.

The conti 23/25 on a 15-17mm (irw) RIM will in most case mount out at 21.5-23.5 and 23.5-25.5mm respectively on that size rim (but as you know you really have to do it and check; but those number have been commonly reported on the Internet.

Given the time frame constraints you face a 23mm on the front will work even if it's two narrow by a smidge but a 25mm on the front that is too wide will be detrimental; so I'd error small. On the back, the wheel will be in the bike wash and it won't matter as much I'd go with 25mm back there as comfort on the long haul will pay dividends in speed.

So...... to get a fast setup at controlled cost, if it was me, I'd grab Qty 2 Conti GP400sII's in 25mm and Qty 1 in 23mm. Mount up the rear 25mm and measure with a caliper; if it's equal to or less than the width of the rim; then mount that for the front too. If the tire is wider than the rim mount the 23mm on the front instead.
 
A

Apollo

Well-Known Member
1happyreader said:
Which would be a DF's front wheel !!! Are there many full disk wheels made for the non-drive wheel ??
Click to expand...
Yes, they've been around for decades but are very rare as a road wheel. In the past, pros used to race on them in TTs and then they were made illegal for road racing. Now, you might see them in track events. Renn will sell them and that's how the Parkers raced with one. The best thing to do is just special order covers from a company that makes them. Cheaper and removable if required.
 
ratz

ratz

Wielder of the Rubber Mallet
RojoRacing said:
Why latex tubes?
Click to expand...

Positives:
1) Better rolling resistance; well tested and well documented in the labs. Latex tubes are also what are in "sew in tires" aka Tubulars.
2) Better puncture resistance to thorn like items.
3) Better resistance to pinch flats

Negative
1) Learning to mount them correctly is harder
2) Need to pump them up before every ride.

The problem with latex is totally in the mounting; they are Absolutely not forgiving; and it's common to blow up your first install by getting a smidgen trapped between the tire and the rim. However once mounted and verified as solid they are more bullet proof that Butyl tubes. Basically get latex, get good at mounting them. Ride, Race and Train on Latex. On your bike for fixing a flat in a ditch carry a Butyl one.

More info and probably presented better; I'm on the go I didn't have time to fact check. That article is probably more accurate than me....

http://www.slowtwitch.com/Tech/What_s_in_a_tube__1034.html
 
LarryOz

LarryOz

Cruzeum Curator & Sigma Wrangler
What Ratz said - great article also - I can attest to some power savings although I do not have specific wattage figures.
"Plus they feel soooooooo smooooooooooth!" How can you not like them!
 
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