Old 05-04-19, 10:41 AM
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igs417
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What would you miss more - comfort of 28 mm tires or convenience of tubeless?

Rider profile: late thirties, 84 kg, road cycling for three years, 150-200 km weekly, solo rides 60-120 km, mostly rolling terrain, no racing, endurance riding, averaging 28-31 km/h

Bike: Canyon Endurace, CF frame, disc brakes, full Ultegra R8000, carbon aero cockpit (H31), split carbon seatpost (S15 VCLS 2.0 CF), aluminium Mavic Ksyrium Elite UST

Reason for upgrade: increase in speed/distance, without compromising comfort and convenience, bling factor


Wheel requirements

  • mid-depth 40-50 mm aero, carbon, disc
  • optimized for 28 mm tires (external rim width 30-31 mm): lower rolling resistance, more comfort, better grip, currently riding 28 mm tires (never really ridden 25 mm), general trend points towards 28 mm, not really willing to go backwards
  • tubeless: big fan of road tubeless, Mavic UST on my current wheels works perfectly
  • long term serviceability
Choice narrowed to these two below. Advantages/disadvantaged listed in the level of importance (to me).


Cosmic Pro Carbon UST Disc
(45 mm deep, 19 mm inner width, 28 mm outer width, 1.650 grams, Mavic hubs, straight pull spokes, aluminium nipples)




  • optimized for 25 mm tires: loss of comfort, higher rolling resistance, (28 mm tires could be used, but then aero advantage is lost))
  • UST, problem free tubeless installation, from personal experience
  • easy access to service and spare parts: Mavic dealer in the neighborhood
  • deeper choice (45 mm), more aero - possibly annulled by higher rolling resistance tires
  • comes with Mavic Yksion Pro tires (poorer performance compared to Conti GP5000TL of the same width)
  • 3 year warranty (draw - most manufacturing defects manifest during initial period of usage, can't imagine lot of defect that occur after three years of use and are covered by limited manufacturer warranty)
  • 1.199 EUR (tires and sealant included)

Reynolds AR41 DB
(41 mm deep, 21 mm inner width, 30 mm outer width, 1.630 grams, Reynolds TR2 hubs, Sapim sprint spokes, brass nipples)




  • fully optimized for 28 mm tires: full comfort and low rolling resistance
  • probable issues with tubeless installation: no confirmed compatibility, forums report experiences from "impossible" to "nightmare"
  • questionable service in Europe (reynoldscycling.com lists only USA dealers, reynoldscycling.eu points to single service center in Germany, in late 2018 Reynolds was acquired by Hayes so Hayes service network will be integrated but such integrations are usually messy in the beginning)
  • narrower choice (41 mm), less aero - possibly annulled by lower rolling resistance tires
  • if mounted with Conti GP5000TL: best in class performance on 28 mm tubeless tires
  • lifetime warranty (draw - most manufacturing defects manifest during initial period of usage, can't imagine lot of defect that occur after three years of use and are covered by limited manufacturer warranty)
  • 1.199 EUR (without tires, pair of Conti GP5000TL and some sealant would be additional 120 EUR, not very important)
Looks like hit and miss both ways.

If I go with Mavic and don't find 25 mm tires comfortable enough, I can switch to 28 mm, but aero penalty kinda kills the point of aero wheels in the first place.

If I go with Reynolds, tubeless could be a PITA (most probably), I can ditch tubeless and just go with tubes, but I loose convenience of tubeless.

Not really considering other wheels options - if I'm forced to go to 25 mm tires, only UST can justify it. On the other hand, if I'm ditching UST, I won't do it for another set of 25 mm optimized wheels.

What would you miss more - comfort of 28 mm tires or convenience of tubeless?
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