Rolling resistance 2 is the class the Swedish ski federation, Svenska Skidförbundet, recommends for training wheels in roller ski races. FF Rollerskis classic roller ski wheels, FF V Active Classic, are on the official list of recommended wheels.
The list is based on independent tests carried out by Svenska Skidförbundet together with Chalmers University of Technology.
Contents
Key facts
- What: Svenska Skidförbundet list of recommended training wheels for roller ski races
- FF wheels on the list: FF V Active Classic, marked with 2
- Class: rolling resistance 2 (RM2)
- Technique: classic
- Tested by: Svenska Skidförbundet and Chalmers
- Latest version of the list: 18 June 2026
What is rolling resistance 2 (RM2)?
Rolling resistance tells you how heavily a roller ski wheel rolls. A higher class means heavier wheels and lower speed.
In the tests, rolling resistance was measured as a friction coefficient (µ). The test group proposes these limits:
| Wheel class | Rolling resistance (µ) |
|---|---|
| Race wheels | below 0.007 |
| RM0 and RM1 | below 0.010 |
| RM2 | 0.010–0.013 |
| RM3 to RM5 | above 0.013 |
Manufacturers are encouraged to aim for 0.011–0.012 for RM2. That keeps wheels from different brands as similar as possible.
With these limits, the test group estimates that wheels account for about one minute of difference over 10 km. Before, the gap could be close to two minutes.
Want the full background? Read our complete guide to roller ski resistance testing.
Why are roller ski races run on training wheels?
Many roller ski races in Sweden are run on training wheels instead of race wheels. This gives:
- Lower speeds and safer races. Read how to brake on roller skis.
- Fairer racing when everyone rolls on wheels in the same class.
- More classes to choose from for training.
How the roller ski wheels were tested
The tests took place on 18 September 2024 at Lugnet ski stadium in Falun, Sweden. Twelve pairs of roller skis and three test skiers took part. The wheels were measured in three ways:
- Double-poling test: skiers double-poled five laps of a 310-metre loop. Pole force was measured.
- Roll-out test: the skis rolled down a test hill, and the distance was measured.
- Instrument test: a Chalmers instrument presses each wheel against a steel roller at 20 km/h, with a load equal to 75 kg.
All three methods ranked the wheels the same way. That means the instrument can classify wheels quickly and fairly.
The testers also measured rubber hardness. They found no clear link between hardness and rolling resistance. As a guideline, 60–66 Shore is proposed for classic wheels. Learn more in our roller ski wheels and bearings guide.
How FF Rollerskis is listed
| Brand | FF rollerskis |
| Class | Rolling resistance 2 |
| Marking | 2 |
| Description | Black rubber wheels with a groove in the middle |
| Technique | Classic |
FF V Active Classic: the wheels on the list
The wheels on the list are FF V Active Classic. They are black full-rubber wheels with a V-groove in the middle, marked with 2.
Buy FF V Active Classic wheels
- FF V Active Classic roller ski wheels – 4-pack
- FF V Active Classic front wheels – 2-pack
- FF V Active Classic rear wheels – 2-pack
Rolling resistance 2 wheels for other brands
The same wheel type is also available in versions that fit classic roller skis from IDT and Swenor. Choose RM2 where you can pick the rolling resistance.
- V-Track Universal Classic roller ski wheels – 4-pack
- V-Track Universal Classic rear wheels – 2-pack
- Swenor rear wheel RM2
See also the FF 360 V Active Classic roller ski, all classic roller skis and all roller ski wheels.
Which other brands are on the list?
The list currently includes nine brands: AE Roller Skis, Elpex, FF rollerskis, Fixy, Skimateria, SkiGo, Skistart, Swenor and Swix. New wheels are added as they are tested.
What the recommendation means for you
- Race organisers: can use the list to ensure equal conditions in rolling resistance 2 races.
- Athletes: can race on FF V Active Classic in events that follow the recommendation.
- Clubs and coaches: can choose roller ski wheels with documented rolling resistance for training.
Important: the list is a recommendation, not an approval for every race. Each organiser decides which wheels are allowed. SSF recommends that organisers only accept wheels with an engraved marking. For now the list covers classic technique only.
FF Rollerskis is also the FIS-approved roller ski supplier to the FIS Roller Ski World Cup.
More about roller skis and wheels
- Roller ski resistance: the complete guide to testing and measurement
- Roller ski wheels and bearings guide
- Classic vs skate roller skis: which should you choose?
- Safest roller skis in 2026
Sources and documentation
- Svenska Skidförbundet: recommendations for training wheels at roller ski races (PDF in Swedish, 18 June 2026)
- Test report: roll tests at Lugnet ski stadium (PDF in Swedish, SSF and Chalmers)
- Chalmers: new regulations for fair play in roller skiing
- Svenska Skidförbundet: rules and guidelines for cross-country skiing (in Swedish)
FAQ: rolling resistance 2
What does rolling resistance 2 (RM2) mean?
RM2 is a standardised class for training wheels on classic roller skis. The test group proposes that an RM2 wheel should measure between 0.010 and 0.013 in rolling resistance on the Chalmers instrument.
What is the difference between RM2 and RM3?
RM3 rolls heavier than RM2. That means lower speed and more resistance. In the proposal, RM3 and higher sit above 0.013 in rolling resistance.
Which FF wheels are on the list?
FF V Active Classic. They are black full-rubber wheels with a V-groove in the middle, marked with 2.
Are FF wheels approved for every roller ski race?
No. The list is a recommendation, not a requirement. Each race organiser decides which wheels are allowed.
Do the wheels fit other brands of roller skis?
Yes. FF makes V-groove wheels of the same type that fit classic roller skis from brands such as IDT and Swenor.
Does the list cover skate wheels?
No. For now the list only covers classic technique. Svenska Skidförbundet is working on a similar standard for skate.