Simply designed with two rollers for the rear wheel and one for the front wheel, just put the bike on top of these three rollers and start cycling, no more traffic and vehicle fumes, it is really a good choice to improve pedal stroke and learn to ride in a straight line as well as to develop core strength.

Feature:
Parabolic rollers with sealed bearing provides stability smooth rolling.
Compatible with 24-29inch bike or the distance between shafts within 97-109cm(38.1-42.9in).
Fold up easily for storage and transport.
Aluminum alloy construction ensures a long time service.
Training indoors to develop core strength and improve pedal stroke as well as learn to ride in straight line.

Specification:
Material: Aluminum alloy & Nylon
Color: Red /_ Blue / Gold / Black (optional)
Unfold size: 145 * 52 * 11cm / 57.0 * 20.4 *4.3in
Fold size: 53 * 52 * 20cm / 22.8 * 20.4 * 7.8in
Max bearing capacity:_ 150kg / 330lb
Weight: 11kg / 24.2lb
Package weight: 11.2kg / 24.6lb

Package list:
1 * Bike Roller Trainer
1 * User Manual(English)