I’ve purchased three sets of 28mm Conti 5000’s. Measured with Calipers, in order of use, they came in at: 30.5mm/31mm 29mm/28.3mm 27.8mm/27.3mm Based on the Silca Tyre Pressure Calculator the exact same tyre, pending on batch has a 17psi delta. (31mm vs 27mm).

[image] alexgold123: the old ‘28’ which may have measured 28 on 13mm internal rims came out as closer to 32 Now I’m wondering which is faster. I imagine the older set would have been more comfortable and grippier will see what this set is like v either way I’d feel better if they measured 28 …

[image] AussieRider: I thought it was 21mm not sure. They’re the DT swiss wheels that come stock with the 21’ canyon Endurace. I tried looking it up but couldn’t find it. I have the same bike. The stock wheels are 20mm internal width.

I mounted a set just yesterday and i received a new caliper for Christmas so I may as well add a data point even though I’m not to fussed about a mm or psi here or there. 24mm internal. Challenge latex tubes. 75psi. 29.08/29.28

[image] DingleTower: I’m not to fussed about a mm or psi here or there. I agree with 1-2 psi but 14 is pretty extreme.

For some. Ha. It’s not ideal, of course, but I’m from the days of pumping tires up to the max on the sidewall and then a few PSI for good measure. Even 17 won’t bother me much. I wouldn’t know the difference if I hadn’t read this thread and decided to measure. :rofl: I know others are far more par…

[image] DingleTower: I wouldn’t know the difference if I hadn’t read this thread and decided to measure As my wife would say, as she’s making fun of me; What about the watts bro? What about the watts??? :nerd_face:

[image] DingleTower: i received a new caliper for Christmas Got one a couple years ago. I use it all the time. Pretty useful for the bike tool kit but also entertaining. Right up there with my Infrared Laser Thermometer in terms of actual need vs taking random unnecessary measurements …

28mm gp5k str on zipp 303s caliper out to 29.7 on the set I have! (Tubeless) 28mm regular gp5k on the dt Swiss arc wheels from my aeroad are like 28.1. (Tubes) I was concerned the almost 30s wouldn’t fit the aeroad. Surprisingly, there’s plenty of room to spare!

28mm Conti 5000's Width Range from 31 to 27mm = 14psi Delta

Equipment

alexgold123 January 31, 2024, 7:15am 29

Old ones, hence me saying old

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28mm Conti 5000's Width Range from 31 to 27mm = 14psi Delta

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