J.Laverack is a new British company. Its opening gambit, the J.ACK Ti Disc, aims to be a four-season bike for all surfaces.
Not only is the frame the first thing you notice on seeing the J.ACK, we’ve barely taken our eyes off of it since. For a frame to outclass Dura-Ace is unusual, but then nothing about this bike is run of the mill.
That beautifully finished frame is made from customised 3Al/2.5V titanium. The stout head tube, housing a steerer that’s tapered for increased stiffness, is fronted by a choice of two head badges. The tubes are on the chunky side of slender, and round except for the top tube’s flattened underside.
Widely set chainstays and downswept seatstays meet at sturdy dropouts, the frame takes 28mm rubber with mudguards, 32mm without, and mudguard, rack or Di2 fittings are available at no extra cost. The welding is stunning, and so neat it’s almost invisible in places. The cables benefit from full-length outer casings, passing through internal channels with immaculately smoothed edges.
The J.ACK has pin-neat welding, internal cable routing and a frame material that could well outlast the rider
With Hope, ENVE, Whisky and Brooks, there were no kit shortcuts, but custom options are available. Brooks’ Cambium C15 saddle won’t be to everyone’s taste, but its firm, supportive ride grew on us.
We’d swap the cable-operated Spyre discs for hydraulics. The TRPs performed faultlessly, but well-set-up hydraulics would complement the classy build, offer more consistent feel and reduced maintenance.
Surprisingly stiff and punchy
Titanium frames have a reputation for comfort and durability, if not for lateral stiffness. Well, this J.ACK smashes that preconception, as the forgiving ride hustles along with a true sense of urgency.
Where some titanium conforms and flows, this frame is more direct, punchy even. It’s not a hard ride, and after 60 hilly miles we still felt fresh, but if you want to go hard the J.ACK is game.
The J.ACK frame can accommodate 32mm tyres but it pairs this with a pretty sharp, direct and punchy ride
Stan’s Grail rims are 24mm wide and 20mm internally, stretching the 25mm Schwalbe One Tubeless tyres to almost 28mm. It’s a willing combination – pretty quick, but hugely robust.
You could fit lighter wheels, but might lose some of the bike’s all-round ability, as it makes a fantastic all-road mount, devouring corners, romping over short climbs and composed over gravel.
The frame costs £1500 (about $2,295 / AU$3,190 at time of writing – J Laverack ships internationally), or £1800 / $2,755 / AU$3,825 with the Whisky fork. Titanium will never be a budget option, but the metal’s durability – and the frame’s quality – helps to justify the cost.
|Name||J.ACK Ti Disc|
|Available Sizes||48cm 50cm 52cm 54cm 56cm 58cm 60cm 62cm|
|Rear Tyre||Schwalbe One Tubeless 25mm|
|Seat Tube (cm)||48|
|Stem||ENVE carbon road|
|Seatpost||ENVE carbon road|
|Saddle||Brooks Cambium C15|
|Rims||Stan's NoTubes ZTR Grail Disc|
|Rear Hub||Hope Pro II Evo|
|Handlebar||Whisky Parts Co No.7 carbon|
|Front Tyre||Schwalbe One Tubeless 25mm|
|Front Hub||Hope Pro II Evo|
|Frame Material||3Al/2.5V titanium|
|Fork||Whisky Parts Co No.7 carbon disc|
|Cranks||Shimano Dura-Ace 50/34|
|Brakes||TRP Spyre SLC callipers, 160mm rotors|
|Frame size tested||56cm|