Road Bike Tire Test: IRC Formula Pro Tubeless RBCC 25

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  • IRC Formula Pro Tubeless RBCC 25
Performance compared to all other road bike tires
(100% is best)
Pro Members get 11-point radar charts



IRC Formula Pro Tubeless RBCC 25 road bike tire on a rolling resistance test machine

The IRC Formula Pro Tubeless RBCC is the first road bike tire from the Japanese brand that we've tested. When testing tires from well-known brands, we usually have a good idea of what to expect but testing new brands is always more exciting as we just don't know what to expect.


Ad Buy IRC Formula Pro Tubeless RBCC at Amazon.com


The Formula Pro Tubeless range consists of 3 tires and the RBCC version fits right in the middle. Also available is a Light version that (obviously) is built a bit lighter, and an X-Guard version that offers an additional layer of bead to bead anti-puncture material.


The RBCC version also makes use of a different compound than the Light and X-Guard. To be more precise, RBCC stands for Rice Bran Ceramic Compound. You can find more information about this compound on IRC's site, but they claim the compound offers increased wet grip and a 10% lower rolling resistance.


All versions of the Formula Pro Tubeless come with an ultra-wide tread that extends onto the sidewall. The width of the tread is quite unique as almost the entire tire is covered with tread. The advantage is better puncture protection of the sidewall and more tread to ride on when using (ultra) wide rims.


The Formula Pro RBCC is available in the 23-622, 25-622, and 28-622 sizes. If you prefer tires with a bit more volume, definitely check our size measurements. The true size of this tire is spot on, which means it's a bit smaller than most other 25-622 sized tires that come in 1 to 2 mm bigger than the specified size.

Manufacturer Specifications


Manufacturer Specifications
Brand IRC
Model Formula Pro Tubeless RBCC
Year 2021
Tire Type Tubeless
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Buy At Ad Amazon.com
Manufacturer part number HT HP-92/TL RBCC BW
TPI -
Compound RBCC
Bead Folding
ETRTO 25-622
Size Inch 28"
Specified Width (mm) 25
Specified Weight 299 grams
Max Air Pressure (psi) 115
Made In Members Only
Available Sizes 23-622 (700x23c)
25-622 (700x25c)
28-622 (700x28c)

IRC Formula Pro Tubeless RBCC 25 Test Results

IRC Formula Pro Tubeless RBCC 25 road bike tire on a rolling resistance test machine

Size, Weight, and Thickness Measurements


Size, Weight and Thickness Measurements
Specified Weight 299 grams
Measured Weight 299 grams
System Adjusted Weight
(tire + valve + rim seal)
319 grams
Measured Width 25 mm (un-round)
Measured Height 22 mm (un-round)
Total Tire Thickness Center 3 mm
Total Tire Thickness Sidewall Members Only
Unmounted Casing Width 61 mm
Unmounted Tread Width Members Only
Tread Cover (Tread / Casing Ratio) Members Only
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


Rolling Resistance Test Results
Inner Tube None (20 ml sealant)
Measured Width 25 mm (un-round)
Rolling Resistance
Real tire width in mm:
22-24 = 132 psi/9.1 bar
25-27 = 120 psi/8.3 bar
28-29 = 108 psi/7.4 bar
Ultra High Air Pressure

(120 psi / 8.3 bar)
14.8 Watts
CRR: 0.00444
Rolling Resistance
Real tire width in mm:
22-24 = 110 psi/7.6bar
25-27 = 100 psi/6.9 bar
28-29 = 90 psi/6.2 bar
Extra High Air Pressure

(100 psi / 6.9 bar)
15.7 Watts
CRR: 0.00471
Rolling Resistance
Real tire width in mm:
22-24 = 88 psi/6.1 bar
25-27 = 80 psi/5.5 bar
28-29 = 72 psi/5.0 bar
High Air Pressure

(80 psi / 5.5 bar)
Members Only
Rolling Resistance
Real tire width in mm:
22-24 = 66 psi/4.6 bar
25-27 = 60 psi/4.1 bar
28-29 = 54 psi/3.7 bar
Medium Air Pressure

(60 psi / 4.1 bar)
Members Only
The Road Bike section is a multi tire size section, air pressures have been adjusted to the measured casing width.

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

IRC Formula Pro Tubeless RBCC 25 road bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread 48 Points
Total Puncture Score Sidewall Members Only
Tread Puncture Force Sharp Needle Members Only
Tread Puncture Force Blunt Needle Members Only
Tread Total Tire Thickness 3 mm
Sidewall Puncture Force Sharp Needle Members Only
Sidewall Puncture Force Blunt Needle Members Only
Sidewall Total Tire Thickness Members Only

Static Grip Test Results


NOTE: Grip test data is only available on tires tested after November 2018. You can find more information about our grip test here: Introducing Grip Testing

Static Grip Test Results
Wet Grip Average 64 Points
Wet Grip Center Members Only
Wet Grip Edge Members Only
Grip in points = coefficient of friction * 100

Conclusion


  • IRC Formula Pro Tubeless RBCC 25
Performance compared to all other road bike tires
(100% is best)

Pro Members get 11-point radar charts

The IRC Formula Pro Tubeless RBCC doesn't bring us much excitement. Performance seems below average at best in nearly all of our tests. The only thing where this tire leaves the competition behind is tread width and sidewall thickness: something that we do not expect as a requirement for many riders.


The price to pay for the wide tread and the resulting thick and protective sidewalls is a higher rolling resistance and very high weight. When we take the volume of this tire into account, it comes out as one of the heaviest tubeless tires we know of, and it doesn't even offer extreme protection.


Although they don't offer an extremely wide tread, better tires are available that also offer good sidewall protection. Check out our road bike overview page, and be sure to use the filters to find a more performant alternative.

Ad Buy IRC Formula Pro Tubeless RBCC at Amazon.com


RATING: 2.8 / 5
TEST VERDICT:
Not Recommended


Comments



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