Big Mama Complete SRAM
Designed for epic days on epic terrain, Big Mama is our four inch travel, 29’er trail bike.
Crafted of custom-drawn scandium tubing, we’ve done our best to design an all-day bike that feels just right, rides just right, and looks…well, pretty damn sexy.
Big Mama uses a single pivot, flexing seatstay design to activate a custom- tuned Fox RP2 air shock. Most importantly, the seatstays act not just as a frame member, but also as an integral part of the suspension design.
At proper sag, the tuned seatstays provide resistance to pedal-induced bobbing while still remaining sensitive to small bump forces. On larger hits, the flexing seatstays work with the linkage to assist the rear shock in moving through its full stroke.
Use of the flexing seatstays also eliminates the need for a rearward pivot. This increases stiffness in the rear triangle. It also lessens stress on the frame’s remaining pivots and bearings and increases durability.
In an effort to keep your wheels where you want them, lateral stiffness has been maximized through tube butting and shaping, removal of the rear end pivot, a one-piece linkage, and the use of large weld areas in critical places.
Some say it is all in the details: Seven forged parts per frame add strength while keeping the weight down. Fantastic standover clearance encourages the rider to tackle tough terrain. Size-specific cable routing keeps it all clean and appropriately out of the way. Mud clearance abounds even with 2.4" tires. The direct mount, post style disc brake mount offers adaptor-free caliper mounting with 160mm rotors.
Big Mama. Sometimes bigger is better.
Big Mama Complete SRAM
| Frameset | |
|---|---|
| Frame | Custom-drawn, size-specific scandium w/ 1-piece AL-7000 linkage |
| Shock | Fox Float RP2 air shock, 190mm (7.5”) eye to eye, 50mm (2”) stroke, Black |
| Fork | RockShox Reba Race, 100mm, Poploc, 1-1/8", White |
| Drivetrain | |
|---|---|
| Crankset | Truvativ Stylo 3.3, 16" = 170mm, 18"/20"/22" = 175mm, Black |
| Chainring | Truvativ Stylo 3.3, 44-32-22T, Black |
| Bottom Bracket | Truvativ GXP, included with crankset |
| Chain | SRAM PC-59 9-speed |
| Cassette | Sram PG-950 9-speed, 11-34T |
| Front Derailleur | SRAM X.7, Top-Pull, 34.9mm |
| Rear Derailleur | SRAM X.9 |
| Components | |
|---|---|
| Headset | FSA Orbit, Black |
| Handlebar | Salsa ProMoto Flat Bar, 11-degree, 710mm width, 31.8mm, Black |
| Stem | Salsa Pro Moto, 1-1/8", 31.8mm, 90-degree, 16"=90mm, 18"=100mm, 20"=110mm, 22"=120mm, Black |
| Grips | Salsa Juegos Lock-on , Black |
| Front Brake | Avid Elixir 5, 180mm rotor, 6-bolt, post-mount |
| Rear Brake | Avid Elixir 5, 160mm rotor, 6-bolt, post-mount |
| Front Shifter | SRAM X.7, 3-speed |
| Rear Shifter | Shifter SRAM X.7, 9-speed |
| Seatpost | Salsa Shaft, 31.6mm, 400mm length |
| Seatpost Clamp | Salsa Flip-Lock, 35.0, Black |
| Saddle | WTB Rocket V with Salsa embroidery |
| Chainstay Protector | none |
| Color | Orange Funk |
| Weight | 29.5 lbs for Med (18") |
| Wheels | |
|---|---|
| Front Hub | Shimano XT, 32-hole, 6-bolt, Black |
| Rear Hub | Shimano XT, 36-hole, 6-bolt, Black |
| Quick Release | Shimano XT, Black |
| Spokes | DT Swiss, butted, 2.0/1.8, Black |
| Nipples | DT Swiss, brass, Silver |
| Rims | Handspun, Mavic TN719D, 32-hole, Black |
| Tires | Continental Mountain King, 29" x 2.2", Kevlar, Black |
Geometry
| Switch to mm | Small | Medium | Large | X-Large | |
|---|---|---|---|---|---|
| A.Seat Tube Length | 16.0 " | 18.0 " | 20.0 " | 22.0 " | |
| B.Top Tube Effective | 22.63 " | 23.5 " | 24.09 " | 24.52 " | |
| C.Head Tube Angle | 71° | 71° | 71° | 71° | |
| D.Seat Tube Angle | 73° | 73° | 73° | 73° | |
| E.BB Drop | 0.88 " | 0.88 " | 0.88 " | 0.88 " | |
| F.Chainstay Length | 18.5 " | 18.5 " | 18.5 " | 18.5 " | |
| G.Head Tube Length | 4.72 " | 4.72 " | 4.72 " | 5.11 " | |
| H.Fork Length | 19.72 " | 19.72 " | 19.72 " | 19.72 " | |
| J.Fork Offset | 1.73 " | 1.73 " | 1.73 " | 1.73 " | |
| K.Wheel Base | 43.47 " | 43.94 " | 44.97 " | 45.46 " | |
| M.Stack | 23.95 " | 23.95 " | 23.95 " | 24.32 " | |
| N.Reach | 15.27 " | 16.1 " | 16.72 " | 17.05 " | |
| P.Stand Over | 27.86 " | 29.16 " | 30.38 " | 31.82 " |
| Switch to inches | Small | Medium | Large | X-Large | |
|---|---|---|---|---|---|
| A.Seat Tube Length | 406.4 mm | 457.2 mm | 508.0 mm | 558.8 mm | |
| B.Top Tube Effective | 575 mm | 597 mm | 612 mm | 623 mm | |
| C.Head Tube Angle | 71° | 71° | 71° | 71° | |
| D.Seat Tube Angle | 73° | 73° | 73° | 73° | |
| E.BB Drop | 22.6 mm | 22.6 mm | 22.6 mm | 22.6 mm | |
| F.Chainstay Length | 470 mm | 470 mm | 470 mm | 470 mm | |
| G.Head Tube Length | 120 mm | 120 mm | 120 mm | 130 mm | |
| H.Fork Length | 501 mm | 501 mm | 501 mm | 501 mm | |
| J.Fork Offset | 44 mm | 44 mm | 44 mm | 44 mm | |
| K.Wheel Base | 1104.3 mm | 1116.2 mm | 1142.3 mm | 1154.7 mm | |
| M.Stack | 608.4 mm | 608.4 mm | 608.4 mm | 617.9 mm | |
| N.Reach | 388.0 mm | 409.0 mm | 424.9 mm | 433.1 mm | |
| P.Stand Over | 707.7 mm | 740.8 mm | 771.9 mm | 808.4 mm |
* Fork is not included. Fork measurements listed are for an average 100mm 29" suspension fork
**Standover (P) is measured vertically from the ground to top of toptube at the mid-point of the toptube
***Standover based on a 29 x 2.4" tire measuring 766mm in diameter
Reviews
Setup
|
Recommended Shock Setup For Big Mama
|
||
| Rider Weight* | Air Pressure | Shock Sag |
| 125 lbs | 60 - 95 psi | 12.5 - 15mm |
| 150 lbs | 85 - 105 psi | 12.5 - 15mm |
| 175 lbs | 95 - 120 psi | 12.5 - 15mm |
| 200 lbs | 115 - 145 psi | 12.5 - 15mm |
| 225 lbs | 130 - 160 psi | 12.5 - 15mm |
| 250 lbs | 145 - 175 psi | 12.5 - 15mm |
| *including riding gear | ||
*Important Note - Correct fit can vary greatly based on each individual riders own personal preference and body type.The suggested sizing info above is based on historical data, as well as from rider and dealer feedback, and may not be applicable to all individuals. This info should be used along with the geometry info also listed on our website.
Highlights
- Scandium, custom-drawn tubeset, 7 forged scandium parts
- Forged, then CNC-machined, 1-piece 7000-series aluminum linkage w/ helicoil inserts
- Fox Float RP2 air shock, 190mm (7.5”) eye to eye, 50mm (2”) stroke, Black
- Enduro sealed cartridge bearings
- Designed around 501mm axle to crown 29'er fork
- Dual driveside bearings at lower main pivot
- 135mm rear spacing
- Standard 1-1/8” headset
- Seatpost diameter: 31.6mm
- Seatpost clamp: 35.0mm
- Post-mount disc brake mount
- Front derailleur clamp: 34.9mm
- Bottom bracket: 73mm
- Includes Salsa Flip-Lock seat collar
- 100mm rear travel
- For use with 100mm travel fork
- Replaceable dropout
- 18” frame weighs 7lbs with Fox RP2 air shock
- Color: Orange Funk