Mojo HD4

Championship winning enduro bike.
It may be slack, but it's not a slacker.

  • 153mm 6" Rear Travel
  • 160mm 6.5" Front Travel
  • 27.5" Wheels • Up to 2.8 tires
  • Suspension • V5 Kinematics

Mojo HD4 Overview

The HD4’s reputation was defined by winning the overall team title in the Enduro World Series. Built for speed, it excels on steep terrain. While slaying the rowdiest descents may be expected of a world class enduro bike, sprinting back to the top is not. Thanks to the dw-link suspension design, cries of “That thing flies uphill” are common among the slack jawed first time riders.

Specs
Wheel Size 27.5” (650b) / up to 2.8 tires
Front Travel 160–170mm forks
Rear Travel 153mm (6 inches)
Boost Axles 148mm rear / 110mm front
Seatpost Diameter 31.6mm
Rear Brake 160mm post mount / 203mm max
Chainstay Length 430mm (16.9 inches)
Bottom Bracket Threaded (68mm English threaded)
ISCG 05 Compatible Optional removable adapter
Tapered Headtube ZS44 upper / ZS56 lower
Colors Fireball Red or Back in Black
Sizes S / M / L / XL
Frame Warranty 7 years
  • Standard Shock
  • Optional Upgrade

Reach

As bikes have become faster and more capable, the notions we held of what was ‘normal’ frame geometry have been blown out of the water and new trends have emerged. Folks seeking greater stability through longer front ends and shorter stems were buying a size up from what we expected. With the HD4 we’ve done that for you by increasing the reach by the equivalent of one size, but without the penalty of an overly long head tube or seat tube. The longer reach combined with a slacker head angle stretched out the wheelbase, and delivers confidence inspiring stability in the roughest and steepest terrain.

Droppers

No one thought they needed a dropper seatpost until they tried a dropper seat post, and no one needed a longer dropper seatpost until they tried a longer one, but you can’t enjoy the benefit of that extra drop if the seat tube is in the way. So we shaved 50mm off the top of each seat tube to give you room to roam. Now there’s enough room for shorter riders to run a 150mm dropper on the small sized frame, or a 170mm dropper for everyone on all of the other sizes, and still get your correct saddle height.

DW-Link

Since the beginning of Ibis 2.0 we’ve partnered with suspension guru Dave Weagle to utilize his dw-link suspension technology to deliver an unparalleled combination of pedaling and bump performance, but dw-link is not a static design. Over the more than 13 years that we’ve worked together, his designs and our objectives have evolved. For the HD4 we utilize the 5th generation dw-link suspension system to maintain the pedaling performance that Ibis bikes have always been known for, but with more progression in the shock leverage curve, allowing for more big-hit capability in very rough terrain.

Travel

With 6.25”(160mm) of travel up front and 6”(153mm) in the rear the HD4 delivers more than enough cush to handle the roughest tracks. In fact, the suspension is designed to stay high in its travel delivering a proportional response to small and mid-sized bumps, and only diving deep into the shock stroke on the biggest hits. Consequently, that 6” manages the terrain better than other longer travel designs that tend to wallow in their mid-stroke.

Linkages

Continuous refinement of our linkage design has resulted in a 40% increase in stiffness at the lower link, and 30% at the upper link than our previous designs.

Plus, we laser etch instructions on how to install properly. "I'm down!"

Shocking

Designed to accommodate ‘piggyback’ style shocks without sacrificing the room for a water bottle, the HD4 ships with Fox's DPX2. The added fluid volume and twin tube damper design manages heat build up and bottom out better than standard inline shocks for the roughest enduro tracks.

For riders who want a higher degree of tunability, we have an upgrade shock available on every kit, the excellent 2018 Factory Series Fox Float X2 with Kashima coating.

To setup sag, go for  14 - 18mm / 25 - 30%.

Build Your Mojo HD4

Loading the Mojo HD4...

Mojo HD4

Progressive Geometry

Enhanced bike handling capabilities over rough and steep terrain.

  • 64.9° Head Tube Angle
  • 74° Seat Tube Angle
  • 16.9" Chainstays

160mm Fork (552mm axle to crown)

Nominal Size   Small Medium Large X-Large
C-to-T Size A 36214.3 39315.5 44517.6 48319.1
EFF Top Tube B 57922.8 60423.8 62824.8 65826
Head Tube Length (4mm stack of lower cup not included) C 873.5 1094.3 1265 1425.6
Chain Stay D 43016.93 43016.93 43016.93 43016.93
Seat Tube Angle E 74º74º 74º74º 74º74º 74º74º
Head Tube Angle F 64.9º64.9º 64.9º64.9º 64.9º64.9º 64.9º64.9º
Wheelbase G 116345.8 119247 121948 125149.3
BB Height (with 2.3 Maxxis Minons) 34313.6 34313.6 34313.6 34313.6
BB Drop 120.5 120.5 120.5 120.5
Stack 57022.5 59023.5 60523.9 62024.5
Reach 41516.4 43517.2 45518 48018.9
Standover 69327.3 71528.2 72928.8 75729.9
Trail 1184.7 1184.7 1184.7 1184.7

Sizing Guide (Rider Height)

s
152–163CM5'0"–5' 5"
m
163–175CM5'4"–5' 9"
l
175–188CM5'9"–6'2"
xl
183–198CM6'–6'6"

Dropper Post Saddle Height Calculations

Do not try to insert your post deeper than these measurements. Forcing the post can result in a seat tube failure.

Frame measurement S M L XL
Center-to-Top (mm) 365 396 448 486
Max Insertion (mm) 225 255 255 280
Saddle height used for dropper measurements:

49mm rails-to-top.

Dropper Post Measurements  

Measurement from center BB to center of saddle rail (mm) for the Fox Transfer

Drop Min/Max S M L XL
150 Min 594.5 605.5 657.5 695.5
  Max 720 751 803 841
125 Min 550.5 581.5 633.5 671.5
  Max 670 701 753 791
100 Min 525.5 556.5 608.5 646.5
  Max 620 651 703 741

Measurement from center BB to center of saddle rail (mm) for the KS Lev Integra

Drop Min/Max S M L XL
175 Min 603 622 674 712
  Max 716 747 799 837
150 Min 566 597 649 687
  Max 676 707 759 797
125 Min 540 571 623 661
  Max 626 657 709 747
100 Min 515 546 598 636
  Max 586 617 669 707

Measurement from center BB to center of saddle rail (mm) for the Rock Shox Reverb

Drop Min/Max S M L XL
170 Min 620 631 683 721
  Max 765 796 848 886
150 Min 580 611 663 701
  Max 725 756 808 846
125 Min 555 586 638 676
  Max 675 706 758 796
100 Min 530 561 613 651
  Max 625 656 708 746

Measurement from center BB to center of saddle rail (mm) for the Crank Brothers Highline

Drop Min/Max S M L XL
160 Min 610 611 663 696
  Max 732 763 815 853

Winning the Traction Battle

Wider rims allows you to run tires at lower pressures, resulting in more traction, better grip.

On the HD4 we suspect most riders will be opting for tires in the middle of the range, around 2.5-2.6, of which there are now many options. The HD4 can be run with 2.35 tires, which you might like for muddier conditions, and you can mount tires up to the 2.8 plus size which work great in loose and gravelly conditions. The bottom line is, depending on where, when and how you ride, there will be an excellent tire option for you.