Endorphin - Champagne
29/27.5 | 27.5
150 | 160
150 | 150



Endorphin - Champagne
27.5/MX ALL MOUNTAIN
This all-mountain model is designed for riders from 4'11" to 6'1", offering a versatile and playful ride. Whether you're hitting your favourite jumps or sessioning technical lines, the Endorphin delivers fun on every ride.
***Endorphin NGX MX build kits shipping in 140/135 travel configuration. Deore and XT MX build kits shipping in 150/150 travel configuration. See Build Kit spec and Geometry for details***
Complete bikes ship unassembled & require a full build. Spec is subject to change without notice. *Dual 27.5 custom spec shown not to spec*. If you have any questions, contact us at info@knollybikes.com.
Sizing
XS (S1) | 150cm - 160cm |
---|---|
S (S2) | 160cm - 170cm |
M (S3) | 170cm - 180cm |
L (S4) | 180cm - 188cm |
Geometry
ENDORPHIN MX29
Front Travel - 150mm / Rear Travel 150mm
Neutral | Slack | |
---|---|---|
Head angle | 64.0º | 63.5º |
Effective seat tube angle | 75.75º | 75.25º |
BB height | 348.5mm | 338.5mm |
BB drop | 7.5mm | 17.5mm |
S1 - X-Small | S2 - Small | S3 - Medium | S4 - Large | |
---|---|---|---|---|
Reach | 412mm | 437mm | 462mm | 487mm |
Stack | 605mm | 614mm | 624mm | 633mm |
Head tube length | 115mm | 125mm | 135mm | 145mm |
Effective top tube length | 562mm | 589mm | 616mm | 643mm |
Actual top tube length | 562mm | 585mm | 608mm | 632mm |
Seat tube length | 335mm | 350mm | 390mm | 440mm |
Seat tube max insertion depth | 260mm | 280mm | 315mm | 360mm |
Theoretical saddle height (from BB axis) | 650mm | 700mm | 750mm | 800mm |
Seat tube angle (actual) | 67.0º | 68.0º | 69.0º | 70.0º |
Stand over height | 694mm | 704mm | 719mm | 731mm |
Chainstay length | 428mm | 428mm | 432mm | 436mm |
Wheelbase length | 1177mm | 1206mm | 1240mm | 1272mm |
Endorphin 27.5
Front Travel - 160mm / Rear Travel - 150mm
Neutral | Slack | |
---|---|---|
Head angle | 65.0º | 64.5º |
Effective seat tube angle | 76.5º | 76.0º |
BB height | 343.5mm | 333.5mm |
BB drop | 7.5mm | 17.5mm |
S1 - X-Small | S2 - Small | S3 - Medium | S4 - Large | |
---|---|---|---|---|
Reach | 419mm | 444mm | 469mm | 494mm |
Stack | 598mm | 607mm | 616mm | 621mm |
Head tube length | 115mm | 125mm | 135mm | 145mm |
Effective top tube length | 562mm | 589mm | 616mm | 643mm |
Actual top tube length | 562mm | 585mm | 608mm | 632mm |
Seat tube length | 335mm | 350mm | 390mm | 440mm |
Seat tube max insertion depth | 260mm | 280mm | 315mm | 360mm |
Theoretical saddle height (from BB axis) | 650mm | 700mm | 750mm | 800mm |
Seat tube angle (actual) | 68º | 69º | 70º | 71º |
Stand over height | 688mm | 698mm | 713mm | 725mm |
Chainstay length | 428mm | 428mm | 432mm | 436mm |
Wheelbase length | 1169mm | 1198mm | 1232mm | 1264mm |


Check out the Dropper Post Calculator and other helpful resources on our Service page.

Specs
MX | 27.5 | |
---|---|---|
Fork A/C length | 565mm (29" inc. headset) | 562mm (27.5" inc. headset) |
Intended use | MX | 27.5 |
Fork travel compatibility | 150mm Nominal 29" mullet | 160mm Nominal 27.5" |
Fork travel | Min / Max 140-150mm | Min / Max: 150-160mm |
Rear travel | 150mm | 150mm |
Rear wheel size and recommended max tire width | 27.5" x 2.6" | 27.5" x 2.6" |
Dropout/Hub spec | 12 x 157mm | 12 x 157mm |
Shock hardware | M8x30mm lower | M8x30mm lower |
Seat post diameter | 31.6mm | 31.6mm |
Seat post inner depth | 300mm+ | 300mm+ |
Dropper post range | 200mm+ (M, L / S3, S4) 175mm+ (X-S, Small / S1, S2) | 200mm+ (M, L / S3, S4) 175mm+ (X-S, Small / S1, S2) |
Headset | ZS 44mm upper & ZS 56mm lower | ZS 44mm upper & ZS 56mm lower |
Post collar | 35mm | 35mm |
Frame material | 6066 Aluminum | 6066 Aluminum |
Internal cable routing | Yes | Yes |
Chainguide mount | ISCG-05 (removable) | ISCG-05 (removable) |
BB shell spec | 73mm BSA threaded | 73mm BSA threaded |
Chainline | 54-57mm with 55-56mm optimal | 54-57mm with 55-56.5 mm optimal |
Rear brake tabs | Post mount 180mm | Post mount 180mm |
Two geo settings | Yes | Yes |
Bottle mounts | Yes | Yes |
Tool mounts | Yes | Yes |
Build kits
NGX MX29 | Deore 27.5 | Deore MX29 | Eagle 90 Transmission MX29 | XT MX29 | |
---|---|---|---|---|---|
Fork | Fox 34 Performance 29" 140mm, 51mm Offset | Marzocchi Z1 27.5” 160mm, 44mm Offset | Fox 36 Performance Elite 29" 150mm, 44mm Offset | RockShox Lyrik Ultimate 29" D2 150mmm, 44mm offset | Fox 36 Factory Grip2 29" 150mm, 44mm Offset |
Rear Shock | Fox Float X Performance 185x50 | Marzocchi Bomber Air 185x55 | Fox Float X Performance 185x55 | RockShox Super Deluxe Ultimate C2 185x55 | Fox Float X Factory 185x55 |
Headset | Cane Creek 40 ZS44/56 | Cane Creek 40 ZS44/56 | Cane Creek 40 ZS44/56 | Cane Creek 50 ZS44/56 | Cane Creek 40 ZS44/56 |
Stem | RaceFace Aeffect R 35mm x 50mm | RaceFace Aeffect R 35mm x 50mm | RaceFace Aeffect R 35mm x 50mm | RaceFace Aeffect R 35mm x 50mm | RaceFace Aeffect R 35mm x 50mm |
Handlebar | RaceFace Aeffect R 35x780mm, 20mm Rise | RaceFace Aeffect R 35x780mm, 20mm Rise | RaceFace Aeffect R 35x780mm, 20mm Rise | RaceFace Aeffect R 35x780mm, 20mm Rise | Spank Oozy 35mm x 800mm |
Grips | Spank Spoon | Spank Spoon | Spank Spoon | Spank Spoon | Spank Spoon |
Brake | SRAM Guide RE 4 Piston | Shimano Deore 4 Piston M6120 | Shimano Deore 4 Piston M6120 | SRAM Maven Silver | Shimano XT 4 Piston M8120 |
Rotors | SRAM Centerline 200mm / 180mm | Shimano SLX 203mm / 180mm (6-Bolt) SM-RT66 | Shimano SLX 203mm / 180mm (6-Bolt) SM-RT66 | SRAM HS2 6 Bolt, 200mm / 180mm | Shimano XT 203mm / 180mm (6-Bolt) SM-RT76 |
Shifter | SRAM NX Eagle | Shimano Deore 12spd M6100 | Shimano Deore 12spd M6100 | SRAM Eagle 90 Transmission | Shimano XT 12spd M8100 |
Seat post | SDG Tellis (S1-S2: 170mm, S3-S4: 200mm), 31.6 | SDG Tellis (S1-S2: 170mm, S3-S4: 200mm), 31.6 | SDG Tellis (S1-S2: 170mm, S3-S4: 200mm), 31.6 | SDG Tellis (S1-S2: 170mm, S3-S4: 200mm), 31.6 | SDG Tellis (S1-S2: 170mm, S3-S4: 200mm), 31.6 |
Seat collar | Knolly | Knolly | Knolly | Knolly | Knolly |
Saddle | SDG Bel-Air V3 | SDG Bel-Air V3 | SDG Bel-Air V3 | SDG Bel-Air V3 | SDG Bel-Air V3 |
Crankset | SRAM Descendent 7k 170mm 30T Ring | Shimano Deore M6130 30T OR 32T, 170mm | Shimano Deore M6130 30T OR 32T, 170mm | SRAM Eagle 90 Transmission 32T, 170mm | Shimano XT M8130 30T OR 32T, 170mm |
Bottom Bracket | SRAM DUB BSA SB+ | Shimano MT501 BSA | Shimano MT501 BSA | SRAM DUB BSA 73mm Wide | Shimano MT800 BSA |
Derailleur | SRAM GX Eagle | Shimano Deore M6100 12spd, Shadow Plus | Shimano Deore M6100 12spd, Shadow Plus | SRAM Eagle 90 Transmission | Shimano XT M8100 12spd, Shadow Plus |
Cassette | SRAM PG1230 Eagle 11-50T | Shimano Deore M6100 12spd, 10-51T, Hyperglide+ | Shimano Deore M6100 12spd, 10-51T, Hyperglide+ | SRAM XS-1275 Transmission 10-52T | Shimano SLX M7100 12spd, 10-51T, Hyperglide+ |
Chain | SRAM NX Eagle | Shimano Deore M6100 | Shimano Deore M6100 | SRAM GX Eagle Transmission | Shimano XT M8100 |
Wheelset | Spank 359 HEX J-Bend 32h (HG) 29/27.5" | RaceFace Aeffect R 30 Trace 28h J-Bend (MS) 27.5" | DT Swiss M1900 SPLINE 28h Straight-Pull (MS) 29/27.5" | Spank 359 HEX J-Bend 32h (XD) 29/27.5" | DT Swiss M1900 SPLINE 28h Straight-Pull OR Spank 359 HEX J-Bend 32h (MS) 29/27.5" |
Front Tire | Maxxis Assegai 29" 2.5WT 3C MaxxGrip EXO+ | Maxxis Assegai 27.5" 2.5WT 3C MaxxGrip EXO+ | Maxxis Assegai 29" 2.5WT 3C MaxxGrip EXO+ | Maxxis Assegai 29" 2.5WT 3C MaxxGrip EXO+ | Maxxis Assegai 29" 2.5WT 3C MaxxGrip EXO+ |
Rear Tire | Maxxis DHR2 27.5" 2.4" 3C MaxxTerra EXO+ | Maxxis DHR2 27.5" 2.4" 3C MaxxTerra EXO+ | Maxxis DHR2 27.5" 2.4" 3C MaxxTerra EXO+ | Maxxis DHR2 27.5" 2.4" 3C MaxxTerra EXO+ | Maxxis DHR2 27.5" 2.4" 3C MaxxTerra EXO+ |



