Issue #030, Review - November 10, 2017

YT JEFFSY 27 CF Pro Race Review

JEFFSY 27 or CAPRA? This is a question many who are currently looking for a new bike on the YT website will ask themselves. For our enduro bike comparison, YT sent us the YT JEFFSY 27 CF Pro Race. Does this bike live up to its name?

For an overview of the test fleet head to the main article: Let’s go Racing! – The 10 fastest enduro bikes in test

YT JEFFSY 27 CF Pro Race | 160/160 mm (v/h) | 12,20 kg | 4.499 €

No, YT didn’t tune the JEFFSY 27 CF Pro Race specifically for this comparison! The bike actually comes as standard with these drool-worthy components. With so much carbon, it’s no wonder that it tops the scale at a remarkable 12.2 kg – the lightest bike on test. The mixture of an E13 cassette with Raceface Next SL cranks and a SRAM X01 drivetrain alone saves around 150 g compared to an Eagle drivetrain with a minimally bigger range. The FOX 34 FLOAT Factory also contributes to the low overall weight of the bike, and is only slightly flexier than a 36. Unfortunately, the light E13 TRSr SL carbon rims couldn’t withstand a hard hit through the tire; the rear rim showed a crack at the end of the test. However, thanks to a one-year “No Questions Asked” guarantee from E13, it would be replaced free of charge.

Compared to the other JEFFSY 27 models, the top model has a centimetre more travel at the front and rear (160 mm), which one clearly feels on the trail. The rear travel feels almost bottomless; it sticks to the ground and thrilled us with enormous amounts of traction. At the same time, the YT JEFFSY 27 CF Pro Race doesn’t feel undefined due to lots of end progression. The FOX 34 at the front also shone with ultra-sensitive response and very effective damping, though it lacks a bit of stiffness on rough sections – a 110mm axle or a 36 would have been better.

The handling is typical YT: buckets of fun and yet composed. On the JEFFSY 27, you feel at home straight away and playfully rail turns. Approaching ledges, the bike invites you to pull up and get air, and through bumps it encourages you to pump and build up speed. Is there something this bike cannot do? Nope! Even the climbing performance is great. Only the seat tube could have been a little shorter and the angle somewhat steeper.

YT JEFFSY 27 CF Pro Race in Detail

Fork Fox 34 Float Factory160 mm
Rear shock Fox Float X Factory 160 mm
Brakes SRAM Guide Ultimaten
Drivetrain SRAM X01 Eagle / E*Thirteen TRS+ Kasette
Seat post RockShox Reverb Stealth
Stem Renthal Apex
Handlebar Renthal Fatbar Carbon
Tires E*Thirteen TRSR
Wheels E*Thirteen TRSR SL
Price € 4,499

The geometry of the YT JEFFSY 27 CF Pro Race

Size	S	M	L	XL
Seat tube	410 mm	450 mm	480 mm	520 mm
Top tube	573 mm	602 mm	625 mm	648 mm
Head angle	66°	66°	66°	66°
Seat angle	74.5°	74.5°	74.5°	74.5°
Chainstay	430 mm	430 mm	435 mm	435 mm
BB Drop	12 mm	12 mm	12 mm	12 mm
Wheelbase	1142 mm	1173 mm	1204 mm	1228 mm
Reach	410 mm	435 mm	455 mm	475 mm
Stack	587 mm	601 mm	614 mm	623 mm
Wheelsize	27.5″	27.5″	27.5″	27.5″

Conclusion

The YT JEFFSY 27 CF Pro Race goes like a rocket and impressed with its plush rear suspension and dialed geometry. It missed the podium by a hair in this comparison, but in terms of value for money it’s the absolute favourite. If you are looking for maximum riding pleasure at the lowest price, you will find it here! Our buyer’s tip!