Trek Emonda SL 5

The Trek Emonda SL 5 is a lively and agile road bike with an excellent frameset and a solid component spec. It provides very good value for money.

• Pros: Fast reacting, comfortable, great ride feel
• Cons: Not aero, wheel issue on our review bike

I'm lucky enough to try out a lot of very high-end bikes (yes, it's a proper job) and riding the Emonda SL 5 makes you wonder whether there's much point spending more than £1,800. Okay, this is still a significant amount of money to spend on a bike but there are a lot of far more expensive models out there that don't provide such a rounded ride.

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Most bikes at this price are good but some aren't – what's the word? – sparky. They put in a solid, dependable performance, and you might be hard pushed to point out a weakness, but they don't necessarily fire you up and get adrenaline coursing through your veins. The Emonda SL 5 does. When you're riding this bike there's no sense that 'this is good but if only...'. You just think, 'This is a great bike,' and you crack on with smashing up the next climb. It doesn't look or feel like a mid-range bike, it does a first-rate impression of a far dearer model.

Trek likes to keep it simple, stupid when it comes to navigating its road bike range. Madone: that's the aero one. Domane: that's the comfort one. Emonda: that's the lightweight one. Easy-peasy.

The Emondas are then divided up into the aluminium ALR and the S, SL and SLR carbon fibre frame platforms, getting progressively lighter and – because this is the way things generally work – more expensive.

Coming in at 8.55kg (18.8lb), the Emonda SL 5 is light but it doesn't feel like Trek has filled the tubes with helium (the frame weight is a claimed 1,091g, size 56cm). The Merlin Nitro SL (£200 more expensive at £1,999.99) that we reviewed back in the summer hit the scales at 7.7kg (17.0lb), for instance, while the Boardman SLR Endurance Disc 9.0 (also £1,999.99) we tested was 8.2kg (18.2lb).

Don't get too hung up on weight, though. I only really bring it up because Trek makes such a big deal of it when talking about the Emonda. Climb aboard the SL 5 and it immediately feels alive, responding keenly as soon as you turn the pedals. Put a serious amount of power through the cranks and it springs forward as if it was just waiting for the flag to drop. Both the head tube and the down tube are enormous, holding the frame firmly in shape when you're recruiting every muscle fibre on an out-of-the saddle sprint or climb.

Relaxed but performance-orientated

Speaking of climbing, the Emonda SL 5 is fitted with a Shimano 105 compact chainset (50/34-tooth chainrings) which, matched to an 11-28 11-speed cassette, provides enough low gears to get you up the steep stuff in relative comfort. All of the other Emonda SLs are fitted with compact chainsets too, by the way, and they all come with frames built to Trek's H2 fit. That requires an explanation and, as luck would have it, there's one coming along right now... While Trek's H1 fit puts you into a low, flat-backed, aggressive riding position, H2 is a little more relaxed, although it's still performance orientated.

I have the 58cm Emonda SL 5 here with a 57.3cm effective top tube, a 55.3cm seat tube and a 19cm head tube. The stack height is 596mm and the reach is 391mm.

With an H1 fit (the Emonda SLR Race Shop Limited frameset is available in H1) the reach is a little longer (400mm) and the stack is quite a lot lower (567mm). You all know what reach and stack are... (no? stack is the vertical and reach the horizontal measurements from the centre of the bottom bracket to the top of the head tube).

Don't get the impression that the Emonda SL 5's H2 fit will have you sitting bolt upright in the saddle because it's a long, long way from that. For comparison, a 58cm Domane SL 5 has a stack height that's 15mm higher and a reach that's 11mm shorter. In other words, the H2 fit sits somewhere in the middle, an Aristotelian golden mean. Or Goldilocks' favourite porridge, if that's a cultural reference that works better for you. Put simply, a lot of people will get on well with the fit because it requires less flex in the back and neck than a traditional race fit without binning off the idea of efficiency.

One aspect of the Emonda SL 5's ride that surprised me is the level of comfort on offer here, particularly for a performance bike with 25mm-wide tyres. Okay, you don't get a clever IsoSpeed decoupler like you'll find on a Madone or a Domane to cushion the ride, but there's a decent amount of give in the seatmast and cap that Trek provides instead of a more traditional seatpost, and in the flattened, ultra-skinny seatstays.

As we all know, saddles always come down to personal preference – what feels like an armchair to one person can feel like a razor blade to another – but the steel-railed Bontrager Montrose Comp specced here has a pressure-relief channel/hole in the centre and loads of flex in the shell so I imagine it'll make more friends than enemies.

Great groupset

The Emonda SL 5 descends with assurance, giving you the confidence to lay off the brakes when others are nervously feathering theirs. When you do need to slow down the Shimano 105 brakes work on the alloy rims to provide plenty of predictable power. Shimano does make very good brakes. These are of the direct mount variety and they can be relied upon to hold tight when you need them. They even put in a decent performance in damp conditions although, like any rim brakes, they're outperformed by disc brakes when it's properly wet. If that bothers you and you can stretch to £2,650, the Emonda SL 6 is available in a disc version – with 12mm thru-axles front and rear, a Shimano Ultegra groupset including flat mount hydraulic discs, and an 11-32t cassette.

As well as the brakes, the SL5's shifters, derailleurs, chainset, cassette and chain are all Shimano 105. We've covered this groupset a million times on road.cc and it really is difficult to fault for the money.

I particularly like the light action shifters. They're slim, comfortable and easy to operate from either the hoods or the drops. There's not a massive difference between these and more expensive Ultegra, or even top of the pile Dura-Ace mechanical shifters. Sure, you can tell them apart but in use... puh! I'd happily use 105 on every ride. It's amazingly popular and rightly so. Although a couple of others run it close, 105 is still arguably the best value groupset out there.

> Head to head: Shimano 105 vs Shimano Ultegra

> And: Shimano Tiagra vs Shimano 105

This has all been a bit of a lovefest so far, but my one tiff with the Emonda SL 5 was right at the start of our relationship. I picked up the bike and was riding home from the office on it – five miles in, whistling a happy tune, thinking about what I'd have for tea, you know the sort of thing – and the front end started to feel... odd. I got out of the saddle on a climb and it felt decidedly spongy. Weird!

I stopped to check everything and it turned out that several spokes had loosened – about eight of them, I think. And I mean that they'd really loosened to the point that the nipples were just about holding on by their fingertips (shut up! Of course they do). My multi-tool has a spoke wrench on it so I tightened them up at the side of the road, then did a proper job when I got home. Since then the wheel has been fine.

I've reviewed loads of Treks before and this hasn't been an issue in the past, so I'm happy to put it down to bad luck. To be honest, if you know which way up to hold a spoke wrench it's not a massive problem, but it would be a pain if you had to book your bike in to a shop and have a mechanic do the fettling for you. Anyway, I've forgiven the Emonda SL 5 for that now and we've both moved on.

Spoilt for choice

The Emonda range is large, kicking off with the Shimano Tiagra-equipped ALR 4 at £1,000 and going right up to the SLR 9, with Shimano Dura-Ace Di2 components, at £8,500 (a customisable Project One version of the Emonda SLR 9 is also available).

There are four SL models ranging in price from £1,500 (SL 4, Shimano Tiagra) up to £4,300 (SL 7, Shimano Ultegra Di2). At £2,000, the Emonda ALR 6, with an aluminium frame, is actually more expensive than the SL 5 courtesy of a next-level-up Shimano Ultegra groupset. The SL 5 is also available as a women's model.

Oh, and you can buy an Emonda SL frameset for £1,350 – but why would you do that when you can get a complete Emonda SL 4 for £1,500?

> Check out our guide to Trek's 2018 road bike range here

As well as the Emonda SL 6 Disc mentioned earlier, there's an Emonda SL 7 Disc, equipped with a Shimano Ultegra Di2 groupset and Bontrager Aeolus Pro 3 Tubeless Ready wheels, for £4,400.

You can certainly get complete bikes with carbon fibre frames and Shimano 105 components considerably cheaper than the Emonda SL. The Focus Izalco Race Carbon 105, for example, is £1,399 and Giant's TCR Advanced 2 is £1,449. Those two are killer value. Equally, there are plenty of carbon/105 bikes out there that are more expensive. Cervelo's R2 105 is £2,199, for example, and BMC's Teammachine SLR02 Two is £2,250.

I would say that you're getting an extraordinarily good frame with the Trek Emonda SL 5 – one that'll handle considerable upgrading if you fancy doing that gradually as and when individual components wear out. It's that which makes this bike such impressive value for money.

Overall, the Trek Emonda SL 5 is excellent. I had an early issue with one of the wheels but that doesn't detract from the fact that this is a fast and nimble road bike that reacts like something considerably more expensive. Also comfortable and well behaved, it makes you question whether it's worth spending any more money than this.

Verdict

A fast and nimble road bike that puts in an exceptional performance for its price