GT Avalanche 2019 Review

MTB Reviews

The third in the series of Mountain Bikes under £500, I don’t mind admitting that this is one of my favorites in the category and for good reason.

GT’s Avalanche Sport is ideal for beginner and intermediate riders and comes at a price that won’t break the bank. You get a great ride and plenty of bike for your money. It has carefully tuned geometry and offers comfort and control on the trails.

The Avalanche is one of the longest running GT models and is often referred to as the little brother to the Zaskar which will cost you £1000 or more depending on the model.


Available in 27.5″ on the small frames and 29” wheels on medium and large frames; which are among the best and most capable frames in the world of hardtail MTB’s.


The Avalanche Sport (27.5) is built on a T6 6061 Aluminium frame with a slanting top tube that gives extra stand over clearance and helps on rougher trails.

Standover clearance is a part of fitting a bike correctly for a rider. Most riders look for 2 to 4 inches of clearance between the top tube and their crotch when standing flat-footed on the ground over the bike.


The frame weight is nicely distributed, and it absorbs vibration efficiently.


The handlebar on this MTB measures 720 mm. It feels wide and helps the rider to maintain control on fast trails. Just watch out for narrow tree gates ???? and bark tatoos.

Gears & Shifters

The mid-level derailleurs from Shimano, are smooth and had no lags in shifting during tests and will stay that way so long as you maintain them. The 27-Speed Shimano Altus shifters are easy to use and respond positively every click.


The Textro are not the lightest brakes and can become noisy when the rotors get hot. Brake alignment can take a few tries if you do it yourself. That said, they modulate well, and the stopping power is confidence boosting.

Not being a Textro user, I did some searching around for reviews and the biggest negative I discovered was noise. If they do get overly noisy, you can soak them in isopropyl alcohol before cleaning carefully with a toothbrush or similar. This returns efficiency and quiets them down.

WTB Tires and Rims

WTB offers durability and grip by layering each of their three different rubber durometers.

I love that they’ve gone anti-bike industry jargon and offer just two lines of wheels and tires “Light” or “Tough.” No need to say more; great tires and rims.


If you’re looking at GT, you are looking at a company with vast experience and a proven track record of manufacturing great bikes. A great starting point or progression to an intermediate level bike or beyond. You won’t be wasting your money on a GT Avalanche Sport.

Scroll down the page for the Tech Chart and you will see just what you can expect for your money.

You can check out prices and options by clicking on the image below. Please know that if you make any purchases I will receive a small commission but the price you see advertised will not be affected.

Comments & Questions

I’m always pleased to offer help & support. Please add your questions and comments below and I guarantee a response soon.

Just Ride Hard, Ride Fair, Nobody Hurt

Tech Chart

Make Model
GT Avalanche Sport 2019
Type of Bike Price Range
Hardtail Under 500
Frame 6061 T6 Aluminum Frame, w/ Triple Triangle™

Replaceable Derailleur Hanger, Disc Brake Mounts, and Zerostack tapered 1 1/8 – 1 ½ Head Tube, 27.5” / 29er Design

Fork SR Suntour XCT-DS, 100mm, hydraulic lockout, Coil
Stem All Terra Alloy 1 1/8” Threadless, 4-Bolt W/ CNC Face Plate, 31.8, 8°
Handlebars GT All Terra Alloy Riser, 25mm rise, 8° sweep, 6° rise, 720mm

Grips: GT Statement logo grips

Brakes Tektro disc, 160/160mm
Gears Front Derailleur: Shimano Altus, 34.9 clamp

Rear Derailleur: Shimano Alivio

Shifters: Shimano Altus, 3×9

Crankset, Chain & Cassette Crankset: All Terra, 44/32/22

Chain: KMC Z99, 9-speed

Cassette: Shimano Alivio, 11-34T, 9 speed

Pedals GT Slim Line Flat Pedal
Wheels Rims: WTB ST i19 double wall

Hubs: Formula QR Front & Rear

Spokes: Stainless Steel

Tires WTB Transition, 27.5 / 29 x 2.25″
Saddle Saddle: All Terra MTB

Seat Post: All Terra Micro Adjust, 6061 Alloy, 30.9 x 350mm

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