Razorblade 29 IV

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Cross Country
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The RAZORBLADE IV is trimmed for lightweight, not wasting a gram on unnecessary details and converts muscle power directly and uncompromisingly into propulsion. Purist design and deliberately minimalist equipment! The recognisably perfect geometry, along with the 29" wheels, results in direct feedback and riding experience. Those familiar with SIMPLON know the RAZORBLADE: speed and agility combined with smooth running, high-quality materials and extra comfort with the vertical flex of the seat post.


In Cosmic Red Glossy or Sand Matt: Racers and summit climbers can look forward to a stylish and clean look. The fully internal cable routing not only ensures a sleek design but also protects the cables. 

When it comes to XC performance, no wishes are left unfulfilled: The Razorblade 29 IV is highly efficient when accelerating. The hardtail ensures maximum control both uphill and downhill. You’ll notice it from the very first second: This MTB loves the technical sections that come with demanding trails.

How do you prevent rides in muddy terrain from turning into a mud bath? With the chainstay shield that is located on the inside of the chainstay of this MTB and protects the frame.


One thing’s for sure: Fast XC rides are even more fun on a lightweight bike like the Razorblade 29 IV. In the standard version, the frame weighs a mere 950 g; in the SL version, the MTB boasts an even lower weight.

During a tour or a competition: The adjustable seatpost ensures safety and fun on technically demanding descents.

Short and crisp or long and challenging: The Razorblade impresses on every route. To make sure that riders don’t run out of water even on longer rides, up to two bottle cages can be mounted onto the Razorblade 29 IV.

For all the Racers: The Razorblade 29 IV is compatible with large chainrings (up to 38 teeth) for maximum speed. Those who mostly ride on flat terrain will be pleased about the compatibility with large chainrings (up to 38 teeth).


Innovative technologies on a high-end level – the Razorblade 29 IV is full of them and scores points across the board.

Power Transfer is the SIMPLON technology that contributes to optimal acceleration. The bottom bracket and chainstays are made from only one piece, which results in increased stiffness. 

Comfort Concept and the flattened VIBREX® seat stays are an unbeatable technology team. With those two combined, the rider can tackle root carpets, steep passages and gravel roads while still enjoying maximum riding comfort.

All technologies on the Razorblade 29 IV at a glance!


Different wheel sizes, an optional Vario seatpost or an ergonomic cockpit: With the following optional equipment, the hardtail can be transformed into your very own customised cross-country powerhouse.

  • Wheels
  • Fork models
  • Ergonomic cockpit
  • Braking systems
  • Seat post

Geometry table

Does the Razorblade 29 IV fit my proportions and riding style? With SIMPLON’s geometry table, you can find the right bike for your individual needs. Because one thing’s for sure: The geometry is a deciding factor in how your bike feels when you ride it!

The perfect frame size is just as important. During an Experience Digital, our experts will help you choose the right size.

Razorblade 29 IV/SL XS S M L XL
A 360 400 430 460 530
B 560 591 603 626 648
C 68,5° 68,5° 68,5° 68,5° 68,5°
D 74,5° 74,5° 74,5° 74,5° 74,5°
E 86 92 97 108 119
F 425 425 425 425 425
G 1074 1106 1118 1142 1166
H 60 60 60 60 60
I 506 506 506 506 506
K 44 44 44 44 44
L 100 100 100 100 100
M 765 792 812 832 882
N 0 0 0 0 0
S 595 600 605 615 625
R 395 425 435 455 475
STR 1,51 1,41 1,39 1,35 1,32
A Seat tube length mm
B Top tube length
C Head tube angle
D Seat tube angle
E Head tube length
F Chainstay length
G Wheelbase
H Bottom bracket drop
I Fork length
K Fork offset (rake)
L Fork travel
M Stand over height
N Travel (Frame)
R Reach
S Stack
STR* Stack to Reach

*STR: The higher the number, the more upright is the seating position.

** The Razorblade IV SL ist not available in frame size XL.


SIMPLON Experience Center

Experience Center

Ready to race? Make an appointment at the Experience Center now and test the Razorblade IV!

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