Minoura Japan – RDA80

RDA80-D (non-remote) / RDA80-R (remote)

Rim-Driven Competition trainer

icon_rda80.gif

For use with Off-Road tires

The RDA system (Rim Drive Action) is Minoura’s patented trainer system that drives the resistance unit via rubber rollers to the rim side wall, not the tire itself.

Because there is no tire contact, there is no tire wear/noise or vibrations caused by the tire tread pattern. This means MTB riders do not have to change tires or have a 2nd bike to do indoor training, just put your MTB bike on and off you go.
For the serious MTB racers it means you can warm up before a race, on your actual race bike set-up, just like road racers. That means less gear to take and easier for you to get ready for a race.

For use with Off-Road tires

The RDA system (Rim Drive Action) is Minoura’s patented trainer system that drives the resistance unit via rubber rollers to the rim side wall, not the tire itself.
Because there is no tire contact, there is no tire wear/noise or vibrations caused by the tire tread pattern. This means MTB riders do not have to change tires or have a 2nd bike to do indoor training, just put your MTB bike on and off you go.
For the serious MTB racers it means you can warm up before a race, on your actual race bike set-up, just like road racers. That means less gear to take and easier for you to get ready for a race.

Road bikes and RDA trainers

There is one very good reason why road racers should use the RDA trainers. If you use the RDA for warming-up and cooling-down at a race event, you do not have to worry about wearing out your expensive racing tires.
That makes the RDA ideal for competitive road racers.

The RDA Magnetic Resistance Unit

The RDA unit was regulated at a medium 365 Watts of power. This is because a larger resistance would require a much stronger roller pressure at the rim end, which would cause much increased wear of the roller/rim.
There are 7 levels of resistance, controlled via the Remote or Dial lever. There is also an accurately 800 gram spin-balanced flywheel, to assist with a very smooth rotation at all times.

RDA80D_blank.jpgRDA80-D (production terminated)
rda80b_white-lever_blank.jpgRDA80B-R
RDA80_system.jpgRDA80_bike.jpgRDA80R.jpg

What's RDA (Rim Drive Action) designed for

Minoura's patented system for both MTB, BMX and road bikes

For use with Off-Road tires

The RDA system (Rim Drive Action) is Minoura’s patented trainer system that drives the resistance unit via rubber rollers to the rim side wall, not the tire itself.

Advantages of RDA

Because there is no tire contact, there is no tire wear/noise or vibrations caused by the tire tread pattern. This means MTB riders do not have to change tires or have a 2nd bike to do indoor training, just put your MTB bike on and off you go.

For the serious MTB racers it means you can warm up before a race, on your actual race bike set-up, just like road racers. That means less gear to take and easier for you to get ready for a race.

For Road racers there is one very good reason why road racers should use the RDA trainers. If you use the RDA for warming-up and cooling-down at a race event, you do not have to worry about wearing out your expensive racing tires.
That makes the RDA ideal for competitive road racers.

How does RDA work

RDA principle

The RDA system drives the resistance unit via 2 rubber rollers to the rim side wall. Both rollers have a quick release system for setting the roller on the rim.
Initially you need to set the height of the rollers, allowing for the rollers to touch a flat part of the rim, which is usually the brake pad surface. This will need to be 8mm in height for a correct contact between roller and rim
One of the rollers drives the resistance unit, the other supports the rim on the other side, eliminating stress on the wheel.
Wheels that have “out of round” issues might not be able to be used.

Wheel installation

Installing the bike is easy. You fit the rear wheel between the wheel holders as usual. Then release the rollers on either side, in no particular way and you are ready.

RDA maintenance

There is no special maintenance. Because the roller drives the resistance run it via a belt, the belt might need replacement at some point of time, depending on usage and environment.

Compatible Tire Sizes

The RDA can be use on tire sizes from 24” to about 700x38 tires. For 29” MTB bikes the RDA-2429 will need to be purchased, which has a taller frame, allowing for a 29x2.5” tire.

ERGO Type Frame

The Ergo frame was designed for additional sideways strength and stability, because of the additional forces on the frame with RDA. It uses large custom shaped tubing for the uprights, which is durable enough to supply 100% support, for riders up to 120 kg in weight. The U-shape is supported by sturdy legs, which fold slightly outwards for a very stable platform. The legs also fold flat for best possible storage.

Specs

SKU
400-5900-00 (RDA80-D) / 400-5910-00 (RDA80-R)
Power Adjustability
7 levels (RDA80-D / R)
Flywheel
Machined steel, 0.8 kgs
Adaptable Wheel Size
26 - 27-inch, 700c
Dimensions
W 630 x D 460 x H 390 mm
Net Weight
8.0 kgs (RDA80-D) / 8.2 kgs (RDA80-R)
Max Load
120 kgs (including bike weight)
Appendage
Instructions manual, Special quick release skewer, Warranty policy card
Warranty Period
1 year

Cautions

Important Notices

  • RDA is not compatible with the latest disc brake specialized rim such as Mavic CrossMax Disc that doesn't have 8 mm or wider vertical area on the rim side.
  • You may feel some slippage when you pedal, but it is not a problem.
  • The magnetic resistance unit will become very hot during workout. Do not touch the unit during and for 15 minutes after the session.
  • Do not touch any spinning part like wheel or roller. To avoid any possible injury, keep children and pets away from the trainer.
  • The maximum load on RDA80 is 120 kgs including bike weight.
  • The couplings are specially designed to fit the supplied quick release skewer. We strongly recommend you to replace the skewer to the supplied one before using the trainer. We will not guarantee the stability if you use your own skewer on RDA80.
  • Any bike with internal transmission type hub cannot be used.
  • Hub nut type bikes can fit RDA80.
  • RDA80 is NOT compatible with Watt-Master.

Options

Useful items for more comfortable training

Training Mat 2
A floor mat to protect the floor or carpet from scratch and stain, and reduces the vibration to the floor up to 75%Doticon_grn_Right.png
Training Mat Lite
A simpler floor mat to protect the floor and carpet from scratch and stain. No feature to reduce vibrationDoticon_grn_Right.png
Extra Pad Set
A set of 4 soft foamed PVC 100 x 100mm pads. Just put beneath the trainer legs to reduce the vibration to the floorDoticon_grn_Right.png
Mag Riser 3
A plastic front wheel leveler block to keep the bike position levelDoticon_grn_Right.png
Safe-T Net 2
100% cotton frame protection net catching salty sweat while trainingDoticon_grn_Right.png

Data Download

Jump to [Data Download] page Doticon_grn_Right.png

Rim Dimension

I'm using a disc brake specialized rim. Can I use it on RDA?

No, except the latest RDA2429.
Our standard rim drive system found on RDA80 or older models requires certain vertical space on the rim side wall for contacting the rubber rollers.
The standard rim for caliper brake is no problem, but some of the disc brake specialized rim (such as Mavic CrossMax Disc) don't have enough space so it is impossible to use RDA.

RDA requires at least 8mm vertical space on the rim side wall.

Slipping Feeling

I feel something slipping when pedaling

On tire drive trainers, the drive roller is pushed hard against the tire, so there is a very solid connection. With the spring loaded rollers from the RDA, the rollers will move around a little on the rim with all the pedalling going on, especially with less smooth riders. This will feel like your tire is slipping a little, but do not worry, it is not a problem for the trainer or rim.
If you feel this is an issue, please try to pedal smoother.

Noise Level

My RDA is louder than tire drive trainer

The biggest concern among trainer users is if it's "quiet" or not.

Actually, RDA touches the flat rim side wall only so it should be quiet technically, but RDA has much more complicated mechanism than stationary tire drive system. Especially RDA is driven via V-belt, it causes another noise while using.

It was true in the past (when the production technique of tire drive system was poor) that RDA was quieter than tire drive, but nowadays the tire drive system has been so sophisticated that it becomes much quieter than RDA.