Road Bike Tire Comparison:
Schwalbe Ironman Tubeless 2015 vs
Schwalbe Ultremo ZX 2014

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Contents and Test Summary

  1. Manufacturer Specifications
  2. Size and Weight Measurements
  3. Rolling Resistance Test Results
  4. Puncture Resistance Test Results
  5. Conclusion
  • Schwalbe Ironman Tubeless
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)

Manufacturer Specifications


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Manufacturer Specifications
Brand SchwalbeSchwalbe
Model Ironman TubelessUltremo ZX
Year 20152014
Tire Type TubelessTubetype (clincher)
Supplied By Bought in storeBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range HighMed
Buy At
Manufacturer Part Number 1170002811600036.02
EAN
TPI 127127
Compound OneStarRaceStar
Bead FoldingFolding
ETRTO 24-62225-622
Size Inch 28"28"
Width mm 2425
Specified Weight 330 grams215 grams
Min Air Pressure 70 psi85 psi
Max Air Pressure 110 psi130 psi
Made In IndonesiaIndonesia
Available Sizes 22-622 (700x22C)
24-622 (700x24C)
23-622 (700x23C)
25-622 (700x25C)
Image
Schwalbe Ironman Tubeless 2015
Schwalbe Ultremo ZX 2014
Image
Schwalbe Ironman Tubeless 2015
Schwalbe Ultremo ZX 2014
Image
Schwalbe Ironman Tubeless 2015
Schwalbe Ultremo ZX 2014

Size and Weight Measurements


Size and Weight Measurements
Model Ironman TubelessUltremo ZX
Specified Weight 330 grams215 grams
Measured Weight 336 grams229 grams
System Adjusted Weight 356 grams
(tire + valve + rim seal)
329 grams
(tire + inner tube)
Measured Width 25 mm25 mm
Measured Height 23 mm23 mm
Total Tire Thickness Center 3.2 mmNo Data
Total Tire Thickness Sidewall 1.2 mmNo Data
Unmounted Casing Width No DataNo Data
Unmounted Tread Width No DataNo Data
All size measurements are taken at an air pressure of 100 psi / 6.9 bars on a 17.8 mm inner width rim.

Rolling Resistance Test Results


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Rolling Resistance Test Results
Model Ironman TubelessUltremo ZX
Inner Tube None (0 ml sealant)Conti Race28 (100gr butyl)
Spin Up Video No VideoNo Video
Rolling Resistance
140 PSI / 9.7 Bar
Not TestedNot Tested
Rolling Resistance
120 PSI / 8.3 Bar
12.9 Watts
CRR: 0.00387
14.1 Watts
CRR: 0.00423
Rolling Resistance
100 PSI / 6.9 Bar
13.5 Watts
CRR: 0.00405
15.0 Watts
CRR: 0.00450
Rolling Resistance
80 PSI / 5.5 Bar
14.5 Watts
CRR: 0.00435
16.3 Watts
CRR: 0.00489
Rolling Resistance
60 PSI / 4.1 Bar
16.6 Watts
CRR: 0.00498
19.5 Watts
CRR: 0.00585
All numbers are for a single tire at a speed of 29 km/h / 18 mph and a load of 42.5 kg / 94 lbs.

Use the formula: RR (Watts) = CRR * speed (m/s) * load (N) to calculate rolling resistance at a given speed and load.

Puncture Resistance Test Results


Puncture Resistance Test Results (higher is better)
Model Ironman TubelessUltremo ZX
Puncture Resistance Tread 13 Points12 Points
Puncture Resistance Sidewall 8 PointsNot Tested

Conclusion


Conclusion
Model Ironman TubelessUltremo ZX
Full Review Full ReviewFull Review
Verdict RecommendedNot Recommended
Rating 3.0 / 52.0 / 5
Buy At
  • Schwalbe Ironman Tubeless
Performance compared to all other road bike tires
(100% is fastest - lightest - thickest - strongest)
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