The direct-to-consumer brand released the Jeffsy mid last year amongst much fanfare  with the 140mm trail bike being the first 29” offering from the gravity oriented Germans. Given the brand’s image, a 29er was certainly a surprise move, but YT acted fast to make sure everyone knew this was a bike that was still built to shred, by pumping out one of the best launch videos of the year. Watch it below.

What’s the YT Jeffsy all about?

Before releasing the Jeffsy, the YT line up consisted of the 27.5” Enduro focused Capra (read our review here) a couple of dirt jump bikes and the Tues downhill bike, so the Jeffsy filled the hole for the type of bike many riders are buying these days, a 140mm trail bike, something that shines on the climbs and descents equally. We’re pretty stoked about this also, as the 120-140mm travel range is also pretty spot on for most Australian conditions.

Despite being the bike with the least amount of travel in the YT line up, it’s clear the Jeffsy is a 140mm bike that wants to throw any stereotypes off a bridge. A burly frame is the first sign of this bike’s eager intentions, and geometry numbers like the slack 67.6 degree head angle and a long front centre tell you the Jeffsy doesn’t want to be treated gently out on the trail.

The Jeffsy has a flip-chip on the shock that allows the rider to switch between two head angle and bottom bracket options. We’re starting the review in the slacker head angle position, but will be alternating between the two positions throughout the course of testing to see how the geometry adjustments change the ride.

Is that a full carbon frame?

It sure is! YT are clearly confident in their carbon layup, as you see many brands going for aluminium rear triangles and chainstays in this travel bracket. The frame’s construction is beautifully finished, with smooth carbon lines throughout, chunky pivot points and well thought out frame protection. The frame is the only carbon you’ll find on this bike, but even still the complete bike weighs respectably smack on 13kg.

A regular shaped water bottle won’t fit in the frame, but YT offer their own “Thirstmaster 3000”, which is a custom water bottle and cage combo for the Jeffsy, with the bottle holding exactly one pint of liquid (an American Pint that is- 473ml). Whilst the inability to fit a regular sized drink bottle in the Jeffsy and the $100 price tag for the Thirstmaster 3000 is a slight annoyance, we believe every trail bike should have somewhere to put a bottle, so we appreciate YT giving riders the option rather than forcing them to wear a pack.

If I don’t pick up this bike assembled from a bike shop, is the bike easy to build out of the box?

We covered YT’s shipping process and what you can expect as a consumer in our review of the Capra last year, and building up the Jeffsy was very simple. As we covered in out article on the Capra, YT really do make the process fairly straightforward, and the boxing of the bike is excellent.

What’s the spec like?

Across their range of bikes, it’s clear that YT put a lot of time into speccing their bikes with parts that are up to the job. They don’t skimp on components in one area to bolster another, and the direct to consumer sales model keeps the pricing keen.

The Jeffsy CF Comp 2 is no exception, and the $5499 price tag represents a favourable dollars to shiny parts ratio. The suspension is handled by Rockshox front and rear, and the top of the line Monarch shock and Pike RCT3 fork are pretty hard to beat as far as suspension goes. The drivetrain is a normally a 2×11 XT arrangement with RaceFace Turbine cranks on this particular model, but we converted the bike to 1×11 before we’d even left the workshop.

Brakes are Shimano XT, with a whopping 200mm front rotor paired with a 180mm rotor out back.

The wheelset is DT Swiss’s M1700 Spline hoops in their narrow guise, coming in at 22.5mm internally. This is the only component we’re feeling a little dubious about, just because we’ve become such fans of wider hoops over the past 12 months.

The Onza Ibex tyres strongly resemble Maxxis’ Minion DHR II tyres, which are a great option for the aggressive trail rider, and they match the intentions of the Jeffsy perfectly. They’re a big 2.4″ front and rear.

It’s funny how the little things can really help a bike make a good first impression – the RaceFace grips instantly meshed with us, and the SDG saddle’s narrow nose works for us too.

How many models are there in the range?

YT bring three carbon Jeffsy models into Australia as well as three alloy models, so there’s plenty of choice. Prices range from $3299-7499, so there’s a good spread for a wide variety of budgets.

Where are we going to ride the YT Jeffsy? 

We’ve just had a trip to some of Victoria’s finest trails, to get to know the Jeffsy, before returning to our home base of Sydney’s rocky, rugged trails. We know one particularly fast local shredder aboard a Jeffsy who pilots it around some technical trails pretty quickly, so we’re interested to see how far we can push the limits of the Jeffsy’s 140mm of travel.