GT Grade Alloy 105 review

Metal version of GT’s striking new all-rounder

Our rating 
5.0 out of 5 star rating 5.0
GBP £999.99 RRP | USD $1,410.00

Our review

Fast enough, comfortable and versatile – GT has a winner on its hands
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A few weeks ago we tested GT’s Grade Carbon Ultegra, and awarded it full marks. But some of the BikeRadar team were ever-so-slightly cynical about yet another species or sub-species of road bike hitting the market – it’s not like there aren’t plenty already – and wondered whether this more-than-a-gravel-racer machine deserved such a high accolade.


But accepting that the carbon Grade is such an impressively comfortable, versatile, high-performance bike, would that still be the case with a much cheaper model with an alloy frame?

  • Highs: Fast enough, superbly comfortable and wonderfully versatile
  • Lows: Apart from a few extra grams and bulky welds it’s very hard to fault
  • Buy If: You want a quality, comfortable road bike with an eye for adventure

The alloy Grade shares geometry with its carbon sibling, and GT’s instantly recognisable triple triangle, although with so much going on with the tubing around the top tube/seat tube/seatstays junction the welding is necessarily quite industrial-looking, lacking carbon’s smooth lines.

The grade’s welding is functional rather than elegant…:
Robert Smith

The Grade’s welding is functional rather than elegant

The groupset is based around Shimano’s 11-speed 105 – it’s superb and nearly the equal of Ultegra, and that’s pretty much all you need to know. There’s an FSA pro-compact 52/36 chainset and an 11-32 cassette, which gives you a very big top gear and a low gear that’ll haul you up most hills without knee strain.

The brakes are very, very impressive, TRP’s Hy/Rd system combining standard cable-pull levers – so you can use off-the-shelf STI units – and hydraulic disc brakes that have their own reservoir. They’re not quite on a par with full hydraulic systems, but they knock spots off most brakes at this price, and on a bike with off-road ambitions that has to be a good thing.

The grade alloy will make a superb commuter and, potentially, tourer, but it’ll also hungily devour far rougher terrain:
Robert Smith

The Grade Alloy will make a superb commuter and, potentially, tourer – but it’ll also hungily devour far rougher terrain

Although it has quite a bulky look, the Grade feels like a road bike when you’re riding on the hoods. On the home commute we averaged 20mph, and though it won’t outstrip lighter, racier machines on fast rides, it won’t hold you back hugely and its comfort is unsurpassed.

Yet there’s much more to the Grade. So, it hustles along nicely on the tarmac. You’d expect that of a bike at this price. It takes in gravel and tracks – not in itself unusual in these days of ‘gravel racers’, but just as with its more exotic Grade sibling, you can take this much further off the beaten track than virtually any other road bike.

GT’s familiar ‘triple triangle’ dates back to the late 1980s:
Robert Smith

GT’s familiar ‘triple triangle’ dates back to the late 1980s

The swept-out handlebar enables you to keep control in more challenging terrain, with the brakes allowing you to stop in an instant or scrub speed off with plenty of control. Even if you’re not planning to be quite so adventurous, the ride itself is so beguiling on the road that unless you’re looking for all-out speed over just about every other consideration – comfort, toughness, versatility – this really does make the Grade.


Although it has fender mounts, rack mounts would have been good for a bike that would make such a capable tourer, but there are aftermarket options available.

Product Specifications


Name Grade Alloy 105 (15)
Brand GT

Available Sizes 51cm 53cm 55cm 56cm 58cm 60cm
Year 2015
Seatpost 2-bolt aluminium 27.2mm
Shifters Shimano 105 11-speed
Stem GT Design 3D forged 6061, 11.5cm
Trail 6.6
Weight (kg) 10.05
Wheelset Alex ATD470 disc, 6-bolt Formula Ultralight hub, 28 spokes front, 32 rear
Weight (lb) 22.56
Saddle GT Bio-Morphic Road dual density base
Bottom Bracket Height (cm) 28.5
Chainstays (cm) 43
Seat Tube (cm) 55.5
Standover Height (cm) 80
Top Tube (cm) 55
Wheelbase (cm) 102.5
Seat Angle 74
Rear Wheel Weight 2110
Bottom Bracket Sealed cartridge
Frame Material Grade alloy, hydroformed 1 1/8-1¼in head-tube, standard BB
Brakes TRP Hy/Rd disc, 160mm rotors
Cassette Shimano 105 CS-5800 11-32
Chain KMC X11
Cranks FSA Omega Mega Exo, 52/36, 172.5mm
Fork Grade Carbon 1 1/8-1¼in, threadless alu steerer
Fork Offset 5.5
Front Derailleur Shimano 105
Rear Tyre Continental Ultra Sport II 28mm
Front Tyre Continental Ultra Sport II 28mm
Front Wheel Weight 1530
Handlebar GT DropTune Ultra Light 6061 alloy 42cm
Head Angle 70
Headset Type Integrated TH sealed bearing
Rear Derailleur Shimano 105 11-speed
Frame size tested 55cm