Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0
Boss 4.0

Boss 4.0

RRP $879.00

Take charge of all trails with the XDS Boss 4.0. Tackle the terrain with serious suspension to absorb the bumps, whilst relying on the 8 Speed Shimano Drivetrain over any incline. The lightweight X6 Alloy Frame will increase your handling, while hydraulic disc brakes provide superior control.

Colour: Pacific Blue


Revolutionary X6 Ultralight Aluminum Frame

Experience a revolution in lightweight and durable alloy with the unique XDS engineered X6 Ultralight Aluminum Frame. The X6 is a top-tier hydroformed aluminum frame using the composition of the stiffest aluminum to bring you the lightest, highest quality and top-tier reliability. Co-developed with Central South University Aluminum Research Institute for engineering excellence.

Absorb Rough Bumps

Suntour XCT-DS-HLO suspension forks absorb blows from uneven surfaces, keeping yourself and your frame comfortable during every ride.

Shimano 8 Speed Gear System

Find the most appropriate gearing ratio for tackling a range of inclines on and off-road with the Shimano TX800/Altus 8 Speed Drivetrain. Shift gears easily with your Shimano Rapidfire shifters.


Frame Size 27.5/13",15" - 29/17",19",21"
Frame XDS X6 6061 Alloy
Fork Suntour XCT-DS-HLO, 100mm travel
Handlebar XDS Alloy 31.8 680mm wide
Grip MTB Rubber
Stem XDS Alloy 70mm
Seatpost XDS Alloy 27.2 x 350mm with clamp
Seat Clamp Alloy 31.8mm with Quick Release
Saddle MTB Saddle
Gear Shifter Shimano M315 Rapidfire, 2 speed
Gear Shifter Shimano M315 Rapidfire, 8 speed
Front Derailleur Shimano Altus M315 front derailleur
Rear Derailleur Shimano TX800SG Rear Derailleur 8-speed
Front Brake Tektro M275 Hydraulic disc with 160mm rota
Rear Brake Tektro M275 Hydraulic disc with 160mm rota
Freewheel Shimano HG318 - 8 Speed Cassette, 11-32t
Pedal MTB Plastic with bearings
Chainwheel Prowheel 22/36T steel rings with Alloy 170mm Cranks
Chain 1/2 x 11/128 x 108L
Headset Alloy integrated
Front Hub Alloy 32H Quick Release Disc
Rear Hub Alloy 32H Quick Release, Disc, Freehub
Spokes 14G Steel with brass nipples
Tyre MTB 27.5 x 2.10, 29 x 2.10 30TPI
Rim XDS XV21 32H Alloy
Bell Alloy flick

Specifications are subject to change at any time and without notice. We recommend contacting your Authorised Reseller before purchasing.

Bike Size Guide

Alloy Frame
Frame Size Number 13" 15" 17" 19" 21"
Wheel Size 27.5" 27.5" 29" 29" 29"
Suggested Height 155-165cm 165-175cm 170-180cm 175-185cm 185cm+
Minimum Suggested Inseam 70cm 73cm 79cm 82cm 85cm
A - Seat Tube 33cm 38.1cm 43.2cm 48.3cm 53.3cm
B - Seat Tube Angle 73° 73° 73° 73° 73°
C - Head Tube Length 11cm 11cm 11cm 11cm 11cm
D - Effective Top Tube 59.6cm 59.6cm 59.4cm 59.4cm 59.4cm
E - Chainstay length 43.5cm 43.5cm 45.5cm 45.5cm 45.5cm
F - Wheelbase 109.01cm 109.01cm 111.2cm 111.2cm 111.2cm
G - Standover 68.2cm 71.8cm 77.7cm 80.7cm 83.7cm
Measure Bike Inseam

  • 1 Stand straight with your back against the wall and feet shoulder-width apart.
  • 2 Place a book between your legs and raise as far as possible, this imitates a seated bike position.
  • 3 Use a measuring device to measure from the top of the book to the floor (in cm). This measurement is your inseam length.