Pivot Cycles Mach 4 SL Pro XT/XTR

The Mach 4 SL was made for XC racing, to a design brief calling for “World Cup focus, but let it punch above its weight”. In other words, it achieves the fast, light build favoured by XC specialists, without compromising on handling and ride quality.

This unyielding performance has its roots in Pivot’s proprietary Hollow Core Carbon frame construction, which gets lighter with each generation, with even the rear shock’s rocker link having been thoughtfully slimmed down. Nonetheless, the carbon maintains the strength and stiffness required to stand up to hard riding.

The geometry of this frame incorporates a relaxed head angle, a long reach and long wheelbase, for stability, and a steep seat angle, for a lower centre of gravity, increased composure and better control over the bike at high speeds.

Since each frame undergoes independent strength to weight analysis and is constructed from custom-tuned carbon to ensure consistent stiffness, you can be sure that the same performance benefits will be delivered, regardless of frame size, especially since the two smallest sizes sport correspondingly lighter shock valving.

As ever, the brand’s flip-chip helps to boost the Mach 4 SL’s versatility, yielding either 106mm or 115mm of rear travel with this build, delivered by a light, trail optimised Fox Factory Float shock that offers three graduated damping positions, allowing it to respond appropriately to different degrees of impact. As a bonus, the shock’s upright position means that, even on the smallest frame option, there’s room for a water bottle – or two, with larger sizes – and clearance for a solid 2.4” tyre.

Pivot’s trademark, position sensitive dw-link^TM suspension, meanwhile, has been tweaked to combat pedal bob more efficiently than ever, so it delivers a plusher, more comfortable ride, whilst saving energy when you’re putting in maximum effort. Its kinematics have also been refined to lend power to your pedal strokes, not to mention an admirable responsiveness, so that you’ll feel in full control and ready to not just respond to, but enjoy, whatever the trail throws at you. 

All of this means the Mach 4 SL frame, which weighs around 1.66kg on its own, 1.93kg with the addition of a rear shock and under 10.5kg fully built, is light and speedy enough to take you to the podium, while also offering a soft enough ride to preserve your energy, along with outstanding control and handling. It will give you the required confidence to put in your best effort during the race, even over challenging, variable terrain.

Key features:

• Designed for XC racing, with handling and speed prioritised as much as a low weight
• With geometry made to ensure control at speed
• With light Hollow Core moulded carbon frame
• 5 different frame sizes to deliver the same benefits to riders of all builds
• With dw-link^TM suspension to maximise rearward wheel path, delivering responsiveness with control
• Kashima coated, trail specialist Fox Factory Float rear shock, size 190x45mm, delivers either 106 or 115mm of rear travel
• Kashima coated, corrosion-resistant Fox Factory Stepcast 34 fork, 29” size, 44mm offset with Fit 4 damper, giving 120mm of travel
• Comes with light, tough aluminium Newman Evolution SL enduro wheelset, 30mm – 29”, 15x110 centre lock F/12x148 R
• With wide, abrasion resistant, tubeless ready 120 TPI Maxxis Rekon Race 29” x 2.40” tyres
• Features the super quiet Shimano XTR M9100 SGS 12-Speed rear derailleur
• With the light Shimano XT M8100 10-51t 12-speed cassette for rapid, smooth gear changes
• Uses matching, responsive Shimano XT M8100 ISPEC EV 12-speed shifter
• With powerful Shimano XT 8100 2-piston brakes
• Uses hardy, stiff and rowdy Race Face Æffect R 34t crank set
• Stiff Phoenix Team Flat Carbon handlebar dampens vibrations and maximises control
• Highly accurate steering with Pivot Cycles' own stiff, shaped Phoenix Team XC/Trail stem
• With light, tight Fox Transfer Factory Series seatpost, either 125, 150 or 175mm, depending on frame size
• Comfortable, versatile Phoenix WTB Volt narrow width saddle

BUILD SPECS

GEOMETRY AND SIZING

A bike for every size

100mm Travel Fork

		XS	SM	MD	LG	XL
A	Seat Tube Length (C-T)	35.5 cm	39.4 cm	41.9 cm	46.0 cm	50.5 cm
B	Top Tube Length	56.5 cm	58.0 cm	60.9 cm	63.8 cm	66.2 cm
C	Head Tube Length	8.5 cm	9.0 cm	10.5 cm	12.0 cm	13.5 cm
D	Head Tube Angle	68.0°	68.0°	68.0°	68.0°	68.0°
E	Seat Tube Angle (Eff.)	76.0°	76.0°	76.0°	76.0°	76.0°
F	Chainstay Length	43.2 cm	43.2 cm	43.2 cm	43.2 cm	43.2 cm
G	Bottom Bracket Height	32.7 cm	32.9 cm	32.9 cm	32.9 cm	32.9 cm
H	Bottom Bracket Drop	4.7 cm	4.5 cm	4.5 cm	4.5 cm	4.5 cm
I	Standover	63.7 cm	64.4 cm	67.2 cm	66.8 cm	69.8 cm
J	Wheelbase	110.1 cm	111.8 cm	114.9 cm	117.9 cm	120.5 cm
	Reach	41.0 cm	42.5 cm	45.0 cm	47.5 cm	49.5 cm
	Stack	57.7 cm	58.0 cm	59.4 cm	60.8 cm	62.2 cm

 

120mm Travel Fork

		XS	SM	MD	LG	XL
A	Seat Tube Length (C-T)	35.5 cm	39.4 cm	41.9 cm	46.0 cm	50.5 cm
B	Top Tube Length	56.8 cm	58.4 cm	61.3 cm	64.2 cm	66.5 cm
C	Head Tube Length	8.5 cm	9.0 cm	10.5 cm	12.0 cm	13.5 cm
D	Head Tube Angle	66.7°	66.7°	66.7°	66.7°	66.7°
E	Seat Tube Angle (Eff.)	74.7°	74.7°	74.7°	74.7°	74.7°
F	Chainstay Length	43.2 cm	43.2 cm	43.2 cm	43.2 cm	43.2 cm
G	Bottom Bracket Height	33.6 cm	33.6 cm	33.6 cm	33.6 cm	33.6 cm
H	Bottom Bracket Drop	3.8 cm	3.6 cm	3.6 cm	3.6 cm	3.6 cm
I	Standover	64.6 cm	65.6 cm	68.4 cm	67.9 cm	70.9 cm
J	Wheelbase	111.1 cm	112.8 cm	115.9 cm	118.9 cm	121.5 cm
	Reach	39.7 cm	41.2 cm	43.7 cm	46.2 cm	48.2 cm
	Stack	58.6 cm	58.9 cm	60.3 cm	61.7 cm	63.1 cm