1. 650B (27.5) Mountain Bikes
  2. GT

GT Avalanche Expert 2018 650B (27.5) Mountain Bike

About the productThe best way to guarantee the new 2021 model is by pre-ordering today.





About the productGT Avalanche Expert, - Hardtail Mountain Bike 27.5/29 2018 matte black

Purpose-engineered for the mountain, high on performance but low on cost. 

One of the longest running GT models. Often called the little brother to the Zaskar the one thing you cannot call the Avalanche is short on features. With a high-end aluminum frame and geometry similar to the Zaskar, you will be able to be out riding hard without busting your wallet.

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Tel: 02920 529 955


Very friendly and helpful staff excellent service great communication


FRAMEAll New 6061 T6 Aluminum Frame, w- Triple Triangletm, Replaceable Derailleur Hanger, Disc Brake Mounts, and Zerostack tapered 1 1-8-1 1-2Head Tube, 27.5-29 Design
FORKRockShox 30 Silver TK 27.5-29 Solo Air, 100mm Travel, Air Spring, w- Rebound Adjust, 30mm Steel Uppers, PopLoc Remote Lockout, Tapered Alloy Steerer - Fork Travel: 100mm
HEADSETIntergrated seal bearing, 1-1-8 UPPER + 1-1-2 LOWER
REAR DERAILLEURShimano Deore, FD-M6025L, 2x10
SHIFTERSShimano Deore Shadow Plus, RD-M6000-GS
CRANKSETAll-Terra VT-551, 36-22T 2pc crankset 24mm spinlde with external BB
HANDLEBARAll Terra Riser Bar, Double Butted, 710mm Width, 15mm Rise, 31.8mm Clamp
SEATPOSTAll Terra AL6061 w- Forged Head
CASSETTESunrace CS-MS1, 11-40T, 10-Speed
SPOKES14G Stainless
RIMSWTB STP i23 double wall TCS Tubeless compatible alloy rim, 32 hole
GRIPSGT Statement
SADDLEWTB Silverado Sport
STEMAll Terra 1-1-8inch Threadless, 3D Forged, 4-bolt w- CNC face plate, 7 Rise, 31.8mm Clamp
BOTTOM BRACKETCartridge Sealed
BRAKE LEVERSShimano Hydraulic Disc Brake Lever
HUBSF Alloy Centerlock Disc, w- Quick Release, R Alloy Cassette Centerlock Disc, w- Quick Release
TYRESWTB Ranger Comp, DNA Compound, 30tpi, 27.5-29x2.25inch F-R - Tyre Size: 2.25inch - Wheel Size: 27.5-29inch
CATEGORY650B (27.5) Mountain Bike
AVAILABILITY Available to pre-order
RockShox 30 Silver TK 100mm Solo Air Fork / Shimano Deore Drivetrain 2x10 Speed / Shimano Hydraulic Brakes / Town to Trails

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Size guide

Mountain bike sizing chart (650b (27.5) mountain bike)
Feet and Inches Centimetres Inches Size
4' 10" - 5' 2" 148 - 158 13 - 14 XS
5' 2" - 5' 6" 158 - 168 15 - 16 S
5' 6" - 5' 10" 168 - 178 17 - 18 M
5' 10" - 6' 1" 178 - 185 19 - 20 L
6' 1" - 6' 4" 185 - 193 21 - 22 XL
6' 4" - 6' 6" 193 - 198 23 - 24 XXL
Women's mountain bike sizing chart (650b (27.5) mountain bike)
Feet and Inches Centimetres Inches Size
4' 10" - 5' 2" 148 - 158 13 - 14 XS
5' 2" - 5' 6" 158 - 168 15 - 16 S
5' 6" - 5' 10" 168 - 178 17 - 18 M
5' 10" - 6' 1" 178 - 185 19+ L
GT Avalanche Expert, - Hardtail Mountain Bike 27.5/29 2018
GT Avalanche Expert, - Hardtail Mountain Bike 27.5/29 2018

Shipping & returns

Shipping is free within England, Wales and parts of Scotland. Due to the size and weight of most bikes however, a charge would apply to shipping remote regions, offshore UK and Ireland.

The courier will require a signature for your delivery. If no one is available to sign for your goods, the courier will leave a card with instruction of where you can collect it.

Working days are Monday to Friday. However, there may be circumstances beyond our control which cause delay and in such circumstances we will endeavour to deliver the goods within 7 days of the date the order was made.


Our flexible finance options mean you can purchase this product with a minimal deposit (or call us and arrange a deposit that suits you). Before applying for finance, please ensure you have read the information on eligability.

Apply for finance online through v12Finance

Pre-order deposit

The quickest way to secure your 2021 model Avalanche Expert


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