Trek 520 Disc review

This is an article by Simon Withers from bikeradar.com

BikeRadar gets world’s first test of Trek’s revamped steel tourer

The Wisconsin-based company has been making its steel 520 bike since 1983 — making it a couple of years younger than Specialized’s Allez and a decade or so younger than the Dawes Galaxy, probably the standard bearer for steel touring bikes, at least in Britain — and started out as an all-round road bike. But in the years since 1983 the bike has flitted between all-rounder and full-on tourer.

The 2019 incarnation is very much the latter beast, having gained even more touring-friendly features than the 2018 model, and it now has some serious expedition chops to its name.

Trek’s 520 ups its touring chops for 2019

The alloy fork has a thru-axle; the front rack can carry 15kg, providing 40kg capacity Simon Withers / Immediate Media

Most notably for 2019 the 520 has gained a 15kg-capacity Bontrager front rack and a much lower bottom gear — the all-important one — compared with the 2018 model. It has also moved from bar-end shifters to more familiar Sora STI levers.

Trek’s original 520 was lugged, whereas today’s model has a neatly TIG-welded chromoly steel frame with an alloy thru-axled fork; the rear wheel has a standard quick-release.

There’s a peg at the rear of the head tube to fix a frame pump under the top tube and a chain peg on the driveside seatstay. There are three bottle bosses on the down tube, allowing you to fix the bottle cage at different points, and further fittings on the fork, so you can adjust the height of the rack or carry more bottle cages if you forego it altogether.

Triple the fun

It’s an old-school mountain bike-style drivetrain, with triple chainset and wide-ranging cassette Robert Smith / Immediate Media

Most significantly for 2019, and a sign of its more adventurous ambitions, is that the gearing has gone even lower than before. Make no mistake, this is a good thing.

If your bike is carrying a 70kg rider (okay, nearer 75kg in my case) and approaching 40kg of kit, and you reach the bottom of a long or/and steep hill, you can never have a bottom gear that’s too low. This is where the very-rarely-seen-on-a-road-bike triple chainset comes in.

Trek should also be praised for making it a 48/36/26t Alivio mountain bike chainset, with a teeny-tiny 26t inner chainring, rather than a Shimano 105 road bike 50/39/30 or similar.

The 11-36 cassette offers a gear for every occasion, and I love the 36t sprocket Simon Withers / Immediate Media

Trek really makes the most of this with the saucer-sized 36t sprocket, which delivers a very low bottom gear (under 20in). The 48×11 top gear (around 120in) is more than adequate for powering down hills, and the Sora gear lever and Alivio rear derailleur pairing works well, even with the large jumps necessitated by the 9-speed 11-36 cassette.

Is that bailout/granny gear too small? Not if you find yourself on an unsurfaced road at the foot of a 2,000ft / 600m peak, which happened to me touring in New Zealand years ago.

TRP’s Spyre brakes offer very good power and control but require more effort than hydraulic discs Simon Withers / Immediate Media

The front thru-axles help you get the most from the TRP Spyre brakes, which are among the best mechanical disc brakes around with the advantage of being easier to fix and fettle than hydraulics when off the beaten track. Okay, they require more effort through the brake levers than even low-end hydraulic disc brakes, but they work in all weather conditions.

That said, the 36-spoke Bontrager Affinity rims give the impression they’d survive the apocalypse. The 38mm Bontrager Hard-Case tyres ride well on tarmac and were fine on the light gravel of my local canal towpath, and the rims will take wider rubber too, so you can fit more gravel-specific or off-road-flavoured tyres.

Go low, go slow, go long…

Sora levers replace last year’s bar-end shifters Simon Withers / Immediate Media

The geometry is touring leisurely, with long chainstays, a wheelbase well over a metre and a slack head-tube angle. This creates a very stable, comfortable, semi-upright riding position, ideal for both touring and commuting.

Contact points are good and you can rack up those miles comfortably, albeit slowly. Where it really comes into its own is in its ability to carry considerable quantities of kit, which is where the super-low gearing helps.

I had no issues with the saddle, from Bontrager, of course… Robert Smith / Immediate Media

My 16-mile commute ends with a few hundred metres of climbing at 10–12 percent, which usually requires out-of-the-saddle honking or even zig-zagging on the steepest section.

Not with the Trek 520. Even with bulging panniers I could stay seated in the bottom gear and spin-spin-spin. On a tourer you want to twiddle and maintain a high cadence rather than crank a knee-crunching gear. If you are loading the 520 up to the gunwales, split the load between the 25kg capacity rear rack and 15kg front, which will balance the handling better.

The Bontrager rear rack is rated at 25kg Simon Withers / Immediate Media

If you have interest with this wonderful Trek 520, please check below.

520 (Red Diablo)	520 (Anthracite)	520 Frameset