The not-so-minor details
BH Lynx 6 27.5 Carbon
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A fantastic, grippy, playful machine.
Beautiful frame construction.
Narrow rims mean tyre pressures can't be too low.
One of life’s most frustrating occurrences is gelato inconsistency; sometimes you get a generous soul who heaps it into the cup like a mad person, other times you leave holding an ice cream that befits a child on a diet. Lately, our relationship with BH bikes has been a little like our relationship with our favourite gelaterria.
In most instances, the experience has been fulfilling and damn tasty (take for instance our time on board the BH Lynx 4.8 29 – superb!). But we’ve also had experiences that left us wanting just a little more, such as our test of the Lynx 6 Alloy 27.5; a fine bike, but just not as satisfying as we’d hoped.
But now the overly-generous staff member is back on shift, and the BH Lynx 6 27.5 Carbon has left us absolutely stuffed to the gills with tasty trail memories.
Don’t be fooled into assuming that the 627 Carbon is just a magic plastic version of the Lynx 6 Alloy we reviewed a month or so ago. The two bikes are chalk and cheese. Where the Lynx 6 Alloy felt a little rough around the edges, the 6 27.5 Carbon is sculpted beauty of a thing, its full carbon frame all curved lines, like someone has stuck 650B wheels onto a dolphin. (Now there’s an interesting concept…). The upper link and pivot hardware are just about the only alloy in the frame, with the bottom bracket shell and headset cups all carbon.
But the differences run far deeper than its sleek carbon skin. Take a closer look at the rear end and you’ll notice the frame/suspension configuration is different too. Whereas the Lynx 6 alloy had a pierced seat tube with the shock located within the frame, the 6 27.5 Carbon is more conventional, with the FOX CTD Factory Series shock positioned in front of the seat tube. Unsurprisingly, the suspension kinematics are quite different on the trail too, but we’ll get into that later.
Dave Weagle is kind of the secret evil genius of the mountain bike industry. He’s got his hands on the levers of many machines, and the Split Pivot suspension system the BH employs is one of his creations. The secret of the design is a concentric pivot around the rear axle which ensures the suspension is uninhibited by braking forces. The rear shock is ‘sandwiched’ between an upper link and the chain stays, so it’s actuated from both ends, and this floating arrangement means suspension forces are not transferred into the main frame. Rear travel is a buttery 150mm, matched with 150mm up front.
If you don’t own a full set of Torx keys, hopefully you got a Bunnings gift card for Christmas, as the BH will require a trip to the hardware store – all the suspension pivots use a variety of Torx fittings, rather than Allen keys. While this is a pain in the proverbial, Torx heads are actually a better solution as they’re harder to round out under high torque loads. While our test riding often got loose, the pivots all stayed tight.
With a remote lockout for the fork and shock, the Lynx 6 27.5 has more cable than Foxtel, but thankfully it’s all neatly managed, with rattle-free internal routing (hooray!) for the derailluers and KS dropper post. The rear brake line is external (double hooray! Overwhelming joy!), as is the rear shock remote cable. The rear shock’s lockout cable does slide backwards and forwards through the cable guides the suspension compresses, which does make us worry about potentially nasty cable rub in wet conditions.
In just about every regard, the BH keeps ticking boxes like a food safety inspector. There’s a press-fit bottom bracket, ISCG mounts, a neat low-stack head tube, and the super neat double-bolt seat post clamp even has a rubber sheath to keep grit out of the frame. You can fit a full-sized water bottle in there, but there’s a catch! Depending on your bottle cage, you may need to file out the cage’s bolt holes in order to sit it further forward; we found the shock’s rebound adjuster just caught on the end of our bottle, turning the rebound dial one click faster with every suspension compression! Thirty seconds with a round file to modify the bottle cage fixed it.
BH have listened to rider and media feedback and the 6 27.5 is specced with cockpit and fork that we felt were sorely missing from the Lynx 6 alloy. A 740mm bar and 50mm stem make for an aggressive front end, and the FOX 34 Float fork sweeps your poor line choices under the rug. We’re hoping that all new season FOX forks work as well as this one, because this fork has more sensitivity than an exposed nerve ending – it’s so smooth at the top of the stroke it felt like we had a slow leak in the front tyre. The Kashima coated shock is equally adept, as always.
The Stan’s Arch EX wheelset is an interesting choice, being very light, and the rims aren’t as wide as we’d normally see on a bike of this travel. Still, our past experiences with these wheels is that they punch well above their weight and they’re wisely wrapped in a pair of Hans Dampfs, which stick like a smashed moth to a windscreen.
Braking, shifting and fishing reel duties are all handled by Shimano, with an XT/XTR combo. A cheaper SLX cassette is also slipped into the mix, but cassettes wear out and you can replace it with a lighter XT cassette in year’s time. As a European brand, the BH is understandably equipped with a double ring drivetrain – the hills are just a lot bigger over there. Even though we’re big fans of a single ring setup, there were times we thankfully slipped into the granny ring on long climbs.
Completing the menagerie of cables out front is a KS Lev dropper post, with its neat remote lever smoothly actuating 125mm of adjustment. Along with two shifters, two brakes and remote lock outs for the fork and shock, there are six cables off the bars, but BH have done an admirable job of taming the serpents’ nest and with the addition of just one zip tie we were able to prevent any cable rub. All the cables use a full-length housing too, which should reduce the need for regular maintenance to keep the lockouts, post and shifting working smoothly. With so many levers for your thumbs to hit, we’ll admit that it took us a good ride or two to stop pushing the wrong button occasionally, stiffening the suspension when we really wanted the big ring!
When we rode the BH Lynx 6 Alloy a couple of weeks ago, we noted the bike’s excellent geometry and the fact that the suspension had the same super lively feel to it as its 29er brother, the Lynx 4.8 29. The genes are strong, and the 6 27.5 has that same ultra-supple, responsive and lively ride quality, but it’s also a far more capable bike when you start pushing harder.
With the 34mm fork leading the charge, the 6 27.5 is a reckless beast. Thanks to the 50mm stem, your weight is naturally pushed back over the rear axle, encouraging you to keep the front end up and plough over all comers. The Lynx has a very short rear end too, which makes it very easy to pick the bike up, jump or pump through the trails – it’s just really playful.
While we found the Lynx 6 Alloy blew through its travel a little easily, the 6 27.5 offers a more progressive suspension feel. When you really slam it, you’ll find plenty of support to the ride, so it’s still responsive when other bikes would be feeling bogged down by the rough riding. Basically, go ahead and treat the bike like it insulted your sister, it’ll take it.
The 50mm stem on the 6 27.5 definitely adds to the ‘get rad’ factor of the bike and makes it really easy to manoeuvre, but it won’t suit everyone. When climbing up ledges or steep pinches, the short stem does leave the bars right in your lap, so we tried going a little longer. With a 70mm stem fitted, we didn’t feel like the bike gave up much of its playfulness, but there was more front end grip in flat turns and the climbing position was better. It’s a horses for courses thing, and like during your teen years, a bit of experimentation is good.
While we’ve ridden lighter all-mountain bikes (and many much heavier too) the 627 is a steady, grippy climber, preferring a conversational pace. We don’t like to rely on lockouts too much, and we often find them too firm and only suitable for the smoothest surfaces, but we actually found the light tune of the Trail and Climb modes on the 6 27.5 to be really usable. In Trail mode the suspension only stiffens marginally, and even when you push the lever further to engage Climb mode, the suspension becomes just firm enough to resist bobbing under heavy pedalling, but not so firm that you’ll be put through the wringer if you leave it engaged for a descent.
This is the all-mountain bike we knew BH had the potential to make, a glamorous (cable nest aside), wicked all-rounder. Those riders with Gravity Enduro aspirations will likely fit a single ring, and for our purposes that would be the only modification we’d likely make in the longer term. But we’re sure that most riders will be completely blown away with the bike as it stands.