I tested and tested the Btwin Rockrider 520, which you can find at the Decathlon for € 299. Subscribe to my channel is free :) goo.gl/to7Rox
TECHNICAL INFORMATION
The MTB ROCKRIDER 520 chassis was designed in 6061 aluminum (only 1.9kg the M size). More stable when cornering thanks to the lowered bottom bracket.
FRONT SUSPENSION
Face the new obstacles (roots, stones, stones ...) in all serenity thanks to the front fork with 80 mm travel.
Easy: adjust the hardness of the fork according to your weight thanks to the wheel.
CHANGE AND TRANSMISSION
3 crowns with 8 speeds, for a wide range of 24 speeds
2 quick change controls on the handlebar.
Left: manage ascents and descents.
Right: regulate the effort more gradually.
In detail:
-Triple crown 22, 32 and 42 teeth
- MICROSHIFT MS22 front exchange
- SRAM X3 rear gear
- SRAM X4 transmission controls, with speed indicators
- Cassette 8 pinions from 11 to 32 teeth SRAM PG820.
HANDLEBAR, HANDLEBAR ATTACK, HANDLE: TAKE CONTROL
With the adjustable handlebar mount, the commands of the RR 520 are right at your fingertips. All in aluminum, the BTWIN handlebar mount of 70 mm (size S), 80 mm (size M / L) and 90 mm (size XL) can be raised thanks to 5 adjustment levels: + 0 mm, + 7.5 mm, + 15 mm, + 22.5 mm, + 30 mm).
In detail:
-Oversize aluminum handlebar, width 660mm (size S and M), 680mm (L and XL)
-B'TWIN SPORT "soft touch" handles, for a good grip and a pleasant contact.
SELLA / REGGISELLA: COMFORTABLE AND SPORTS SESSION
Your MTB releases will be getting longer and longer, so it's important to have a suitable seat. The teams have created an exclusive seat B'TWIN ERGOFIT Evo. Suitable for all the widths of the basin, the "hammock" profile is very appreciable during sports excursions. With the FLEX aluminum seat post with a diameter of 27.2mm, for great comfort.
Seat height easy to adjust thanks to the collar with quick release.
DOUBLE DISC BRAKES: MANAGE THE BRAKING
The conditions with which you move do not matter (dry / wet / mud), the mechanical disc brakes HAYES MX5 front and back allow a powerful and progressive braking.
TEKTRO aluminum brake levers are easy to grip, light and precise.
WHEELS 27.5 "DOUBLE WALL
Have fun with the 27.5 "AERO TRAIL Evo aluminum double wall wheels.The diameter is an excellent compromise between comfort and performance.With 28 spokes are light, rigid and resistant.
COVERS FOR DRY SOIL
Exclusive Tires B'TWIN ALL TERRAIN DRY 27.5 "x 2.0 suitable for dry soil The side tiling adheres well to cornering, with a good performance thanks to the central tread and a good grip in the curve thanks to the side tiling.
The recommended pressure according to the weight of the mountain biker is indicated on the side of the tires.
WEIGHT
14.35 kg the size S without pedals.
14.45kg the size M without pedals.
14.55kg the size L without pedals.
14.70kg the size XL without pedals.
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