Designed from the ground up to offer a riding sensation both climbing and descending like no other. Meet the Morf.
Progressive geometry based around a bespoke 4130 chromoly tube set and 27.5” wheels, offering superior strength on the sections where you want to let it all out and smooth compliance on those trickier sections where traction is scarce.
Designed around a 35mm stem, the slack (but not too slack) 65-degree head angle combined with the shorts stays and long top tube makes it super agile and fun, giving you a perfect riding position to attack any terrain with the confidence of a full suspension rig.
These features combined with a stout 130mm travel fork, keeps perfect balance and shape allowing you to ride on the front of the bike, boosting grip and confidence. Rail those turns and conquer the steeps.
The Morf excels uphill too with a steep seat tube placing you in an efficient forward pedalling position, even on the most technical climbs. The custom flattened rear stays offer tuned compliance creating better traction over anything from rocks and roots to loam and dust.
Proven enduro winning race credentials under Stif staff rider, Matt Wight, the prototype Morf bike won the 2015 ‘Ard Rock Enduro Sports Class recording the overall fastest stage time of the day, as well as podiums at the Welsh Gravity Enduro Series and Red Kite Enduro Series.
Produced in conjunction with legendary frame designer Brant Richards, we have used 30 years unrivalled MTB experience to build a bike you can ride anywhere and totally depend on.
Whether it’s a quick blast down your local trail, taking on your fully suspended mates at an enduro race or an all-day moorland epic, the Morf is ready for it.
- Designed in partnership with legendary frame designer Brant Richards
- Tested in house using our collective knowledge spanning 30 years in the trade.
- Progressive, long, low and slack frame designed to mimic the riding position of a modern full-suspension bike.
- 65 degree head angle, optimized for a burly 130 mm fork with a 35 mm reach stem.
- 27.5" Wheels
- 12 Bore Chain-stay Bridge gives clearance for 2.4" tyres with up to a 36T chainring and allows super short 420 mm chainstays.
- 4130 Chromo, Tig-Welded, Steel frame
- Bottle cage bosses on down-tube
- Ovalised seatstays and top-tube create a very compliant ride whilst retaining stiffness in key areas.
- Stealth Dropper Post Routing
- ISCG OLD (03) Chain device tabs
- 142 x 12 mm rear axle
- 3 Year Warranty
- 5 Year Crash Replacement Pricing
"A tough as nails hardtail that can stick it to the full sussers"
- Bike Radar
"Everywhere you look on the Stif Morf, you see nice detailing that has been thought about - from the butted tubing and external transfer plate gussets to the simple cable guides and internal dropper post routing."
- Factory Jackson
"The grip too seems far beyond what could be expected from a hardtail, as the Morf begs to be ridden harder and faster, taking big jumps in its stride and exiting corners so fast"
XT Build Spec
|Fork||Rockshox Pike Solo Air RC 130 mm|
|Rear Derailleur||Shimano XT M8000 GS RD|
|Shifter||Shimano XT M8000 SL|
|Brakes||Shimano XT M8000|
|Rotors||Shimano RT86 ICE TECH 180 mm front / 160 mm Rear|
|Crankset||Shimano XT M8000 32T w/BB 175 mm|
|Cassette||Shimano XT M8000 CS 11-42|
|Handlebar||Burgtec RideWide - 30 mm Rise - 800 Width w/ cutmarks - 35 mm clamp|
|Stem||Burgtec Enduro mk2 35 mm length w/ 35 mm clamp|
|Headset||Hope 2 H with Hope top cap & bolt|
|Seatpost||KS Lev Si 150mm with Southpaw|
|Saddle||Burgtec The Cloud w/ cromo rail|
|Front Wheel||Hope Pro 4 hub laced to WTB Frequency Team i25 TCS rim|
|Rear Wheel||Hope Pro4 142x12 hub laced to WTB Frequency Team i25 TCS rim|
|Front Tyre||Maxxis Minion DHF 3C EXO TR 27.5 x 2.3, Tubeless|
|Rear Tyre||Maxxis Minion DHF 60/62a EXO TR 27.5 x 2.3, Tubeless|
|Tubes / Sealant||WTB TCS Sealant & WTB TCS Valves|
|Reach||425 mm||435 mm||455 mm|
|Stack||600 mm||605 mm||625 mm|
|Head Tube Angle||65.0°||65.0°||65.0°|
|Seat Tube Length||380 mm||430 mm||480 mm|
|BB Drop||42 mm||42 mm||42 mm|
|Wheelbase||1145 mm||1160 mm||1190 mm|
|Chainstay Length||420 mm||420 mm||420 mm|
|Head Tube Length||100 mm||110 mm||130 mm|
|Top Tube Length||615 mm||630 mm||650 mm|
|Seat Tube Angle||73.5°||73.5°||74.0°|
figures based on a fork of length 522 axle to crown and Maxxis 2.3" Minion Tyres
When it comes to descending the short back end and slack front end gives plenty of confidence to pick lines that I never use to. It is also very easy to live with on longer rides out into the Dales as, although a hard tail, my arse doesn't take the pounding that it did on an aluminium frame. I’ve always taken all the advertising and geometry tinkering that is associated with bikes and new fads with a massive pinch of salt but I’m really enjoying this bike.
in my humble opinion it's a cracker!"
- David Copas, Customer
What chain-guide can I run?The Stif Morf has ISCG 03 (sometimes referred to as ISCG OLD) chain device tabs.
Can I mount a front derailleur?The Morf has been designed to run a 1x (single ring) drive-chain.
What kind of dropper post fits the Morf?The Morf is designed to run an internally routed dropper post. Such as the KS Lev Integra. You'll need a 30.9 mm size.
What fork size is recommended?We recommend a 130 mm fork for the Morf. You can run up to a 140 mm fork, but the bike has been designed around a 130 mm and we feel it handles best with this length. The geometry has been specifically designed to run a short but stout fork, which helps keep the bikes shape on the descents.
What is the torque spec for the seat collar?We recommend greasing inside your seat tube regularly and not tightening your seatclamp above 5nm. Over tightening your seat clamp can cause wear to your dropper seatpost.
What kind of headset does the Morf use?The Morf uses a 44 mm internal upper cup, with an external 44 mm lower cup. The SHIS name is ZS44/28.6 and EC44/40.
What brake mount does the Morf have?The Morf has a 160mm post mount.
What size brake rotor should I use?Rear Rotor size is 160mm
What size bottom bracket shell does the Morf use?We use a standard British 73 mm threaded BB.
What size rear hub does the Morf use?The Morf uses a 142x12 mm rear hub. Bikes and frames come supplied with a Rockshox Maxle Ultimate.
What size seat clamp do I need?The Morf uses a 34.9 mm seat clamp.
What size seatpost do I need?This morf uses a 30.9 mm seatpost. Always ensure there is at least 100 mm of seatpost inserted into the frame.