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Schwalbe will be making a 38mm Pro One. This would make a great road/light gravel tire for gravel bikes.
chas wrote:That is great news. I've been riding on pro one at 38 mm wide for a year and I love it. But to get that size I had to put the nominal 34 mm version on a super wide rim but still it's an amazing go anywhere do anything tire. Well anything from very aggressive group Road rides to some chunkyard pack around here.How wide is your super wide rim? I mounted 34 mm Corsa N.EXT on 30 mm (inside) rims just because at the time those rims didn't have tires on them. The combination measured 37.5 mm and worked fine for a few rides but didn't pass the eye test for regular use. On 25 mm rims those tires measure 35.5 mm and I've had no problems after about 450 miles.
Volsung wrote:It's good to have options but Challenges are so good it's kind of unnecessary.
vespasianus wrote:
Has their reliability changed? My Gravel Grinder Pro's came apart - the casing - leaving me stranded 25+ miles from home in the middle of nowhere. Read several threads of people having the same issue. Scared the crap out of me in regards to that brand.
Volsung wrote:It's good to have options but Challenges are so good it's kind of unnecessary.I just ordered a pair of 40 mm Strada Bianca Pro (tube type) from Bike24 on sale for just 36 Euros each. Including shipping and currency conversion that's under $100.
chas wrote:That is great news. I've been riding on pro one at 38 mm wide for a year and I love it. But to get that size I had to put the nominal 34 mm version on a super wide rim but still it's an amazing go anywhere do anything tire. Well anything from very aggressive group Road rides to some chunkyard pack around here.
shiggy wrote:hardy the same as a properly wide casing. I hate the handling of tires on overly wide rims (which you have done IMO), and have suffered many pinch flats and cut sidewalls with such.I'm running 34 mm Corsa N.EXT on 25 mm (inside) rims. I don't know if that combination qualifies as "overly wide rims" but the tires measure about 35.5 mm, handling is great, and I've had no pinch (or other) flats or sidewall damage. I'm running them between 40 and 50 psi and I weigh about 165 lbs. For the reasons you mention I haven't tried lower pressures.
Volsung wrote:So apparently Challenge Pros and HTLRs are the same thing.
Volsung wrote:So apparently Challenge Pros and HTLRs are the same thing.AFAIK Pro means handmade with supple casing and HTLR means tubeless ready. Some of the Pro tires are HTLR, others are not. The non-HTLR versions are lighter and cheaper.
stu wrote:I'm running 34 mm Corsa N.EXT on 25 mm (inside) rims. I don't know if that combination qualifies as "overly wide rims" but the tires measure about 35.5 mm, handling is great, and I've had no pinch (or other) flats or sidewall damage. I'm running them between 40 and 50 psi and I weigh about 165 lbs. For the reasons you mention I haven't tried lower pressures.
IME the same tire at the same inflation pressure on 20 and 25mm rims will feel firmer on the wider rim, which can encourage you to drop the pressure, making pinch flats more likely, and can let the casing collapse in hard cornering
Two wheel vehicle tires are meant to be a round profile. When they get squared off the agility suffers. I have also had it affect the tracking.
Mostly, I like an internal rim width of 20-25mm. 20-23 for 38-45mm road/gravel tires. 25mm rims are the maximum I am OK with for 42-45 road tires. I use 23-25mm rims on my MTBs for tires up to 2.6”, and I do have a couple of 30mm wheel sets for 2.3-3.0” tires. Ran the 3.0” tires on 45mm rims and suffered two pinch flats and three sidewall cuts in 3.5miles over two rides.
shiggy wrote:IME the same tire at the same inflation pressure on 20 and 25mm rims will feel firmer on the wider rim, which can encourage you to drop the pressure, making pinch flats more likely, and can let the casing collapse in hard corneringI agree the tires feel firmer both radially and laterally on a wider rim but I've never used pressures anywhere near low enough to risk casing collapse in cornering. I think that's more likely to be an issue with really narrow rims, like 1/3 of the tire width.
Two wheel vehicle tires are meant to be a round profile. When they get squared off the agility suffers. I have also had it affect the tracking.The 2022 ETRTO standards allow down to a 28 mm tire on a 25 mm rim, only 12% wider than the rim. I suppose that's safe, as in not likely to blow off, but I wouldn't ride that combination on anything much rougher than a velodrome. On pavement I've had good results with tires between 40% and 80% wider than the rim. Off road everything is different, I'd say 80% wider than the rim is more like a minimum.
Mostly, I like an internal rim width of 20-25mm. 20-23 for 38-45mm road/gravel tires. 25mm rims are the maximum I am OK with for 42-45 road tires. I use 23-25mm rims on my MTBs for tires up to 2.6”, and I do have a couple of 30mm wheel sets for 2.3-3.0” tires. Ran the 3.0” tires on 45mm rims and suffered two pinch flats and three sidewall cuts in 3.5miles over two rides.
stu wrote:I agree the tires feel firmer both radially and laterally on a wider rim but I've never used pressures anywhere near low enough to risk casing collapse in cornering. I think that's more likely to be an issue with really narrow rims, like 1/3 of the tire width.
stu wrote:The 2022 ETRTO standards allow down to a 28 mm tire on a 25 mm rim, only 12% wider than the rim. I suppose that's safe, as in not likely to blow off, but I wouldn't ride that combination on anything much rougher than a velodrome. On pavement I've had good results with tires between 40% and 80% wider than the rim. Off road everything is different, I'd say 80% wider than the rim is more like a minimum.
I forgot to mention most of my experience is with tires having slick or nearly slick treads. Those have a round profile with just about any rim width though the radius may vary. For any tire with significant tread I'd follow the tire maker's rim recommendation.
barrows wrote:Umm... 25 mm internal width road rims are common, and are designed for best performance with 28-30 mm tires! See Enve or Zipp's latest aero wheels for road racing, used by many in the pro peloton with 28 mm tires.Yes, wider rims give better aerodynamics and don't weigh much more in carbon fiber. But I still wouldn't use that combination on badly broken-up pavement or gravel where there's a possibility of pinch flats, rim strikes, or sidewall cuts.
Volsung wrote:Someone stop Shiggy from finding out about fat bikes.