Trail and Enduro Bikes

YT Jeffsy 27

New smaller wheel 160mm has big hoofs to fill

The 165mm YT Capra melted hearts when it was launched a few years ago delivering on performance and yet not taking too much from the pocket. The new Jeffsy ’27 looks set to follow the path set by the capable goat with its flowing lines anD melted metal paintwork.

Words: Ieuan Williams Images: Roos and Hjord

The boys from YT over in Germany have made a serious name for themselves over the past few years with world acclaimed bikes world downhill titles to boot. Not so long ago the 160mm Capra was taking the world by storm with its great spec, geometry and unbelievable price. More recently the 29” wheeled Jeffsy has been wildly popular and one of our favourite bikes of 2016.

This is the 650b version of the Jeffsy. It comes on four sizes, offers 150mm travel front and rear (although flagship CF Pro has 160mm) and comes in carbon and aluminum and prices ranging from £1799 up to the top of the range at £3799. They’re all good.


The six build kit options begin from the lower end of the scale with the Jeffsy 27 AL TWO rising to the flagship Jeffsy 27 CF PRO RACE giving you a parts list that can’t be faulted. Two aluminum builds, four carbon.

The aluminum framed AL TWO comes with a 2×11 Sram GX drive that is totally on the money, a Rockshox Reverb Stealth post and a DT SWISS wheelset. It makes for an impressive bike. The AL ONE build has a few different parts like the Race Face Turbine crank and an E-13 dropper post that was smooth as silk and a nice change to the regular post.

On the carbon end of the spectrum you have the Jeffsy CF PRO is second in line so to speak. This comes equipped with SRAM Guide RSC stoppers and SRAM Eagle XO1 gearing. Damper wise, a Fox Float elite performance shock holds the rear up taking the 150mm travel that all of these models have to offer, the FOX 34 performance elite 150mm fork upfront is the first point of contact. With the Maxxis rubber, Race Face SIXC cockpit and E-13 TRS wheelset this is a very generously specified bike.

Top of the pile however is the Jeffsy CF PRO Team, a different beast to the others with an extra 10mm of suspension travel to offer through a FOX Float X Factory at the rear and FOX 34 Float Factory up front. The SRAM Eagle has gone and been replaced by SRAM X01 11 speed and an E-13 TRS+ cassette with an impressive 9 tooth bottom gear almost giving the same range as the Eagle. E-13 rubber matched up with the TRSR SL wheel set makes for a light and stiff build. SRAM Guide ultimate stoppers and Renthal bar and stem round it up nicely.


The proof is in the pudding they say, so how does the Jeffsy ride? The bike in question was the top end CF PRO team in size XL. In terms of size a six foot tall rider will be good all day on the XL, it was certainly right up my street and, together with the Reverb on full extension for the climbs and slammed down for descents there is a good clearance. If I’m being picky it could well be short in the top tube for the overly tall riders out there.

It’s in the suspension and travel that you begin to see differences between the bikes. The new Jeffsy’s are all running a metric length shock with a 230mm eye to eye. The difference between the other five builds to the top team bike is the stroke length. The lower models have a 60mm stroke and the FOX Float Factory has 65mm giving an extra 10mm shock travel. The main frame design is the same throughout though. The 160mm CF PRO has a 66 degree head angle, it’s lively and nimble feel on track, easy to pedal the few hours up the mountains to get back to the top.

Issues? Only a couple of nitpicks. The carbon frame, bar and wheel combination did give a very stiff feel over the high frequency bumps at high speed and there was a small amount of play in the rear stays after the few days so it would be good to find the longevity of the bike in a UK winter.

All told, at NO point did I feel that the Jeffsy was under gunned or out of its depth even when riding some very questionable rocky tracks. However it did get me asking why you would chose this bike over the Capra?

The answer? Who actually cares. YT have masterminded yet another classic. Lightweight and elegant, low priced and loaded.

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