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Trek Session Al Frameset

Trek Session Al Frameset
  • Color: Deep Dark Blue to Alpine Blue Fade
  • Color | Size | Wheel Size: Deep Dark Blue to Alpine Blue Fade | R3 | 29-inch
Color: Deep Dark Blue to Alpine Blue Fade
Size: Select size
Wheel Size: 29-inch
Please select options Unavailable


Session AL frameset gives you an awesome foundation for building up your ideal downhill machine. The new high-pivot suspension design keeps you nimble, planted, and blazing fast on even the most punishing runs, and burly alloy construction rolls with the punches on gnarly and technical trails.

- New suspension layout with a high pivot and idler pulley increases traction, carries more speed, and reduces pedal kickback for more stability
- Virtually zero pedal kickback means you’ll stay confidently planted and in control during descents—especially when landing jumps or drops
- The high pivot design delivers a more efficient rearward axle path so you’ll carry more speed and your wheel won’t get hung up on obstacles
- Adjust your suspension progression by flipping the lower shock mount chip—20% for plush park rides, 25% for racing efficiency
- Our new DH sizing system is based on reach, not rider height, which is the most important factor in a great downhill bike fit

Geometry Chart:
Frame size letterR1R1R2R2R3R3
Geometry positionHigh LowHighLowHighLow
Wheel size29" 29"29"29"29"29"
A — Seat tube42.5 42.542.542.542.542.5
B — Seat tube angle61.6° 61.0°61.6°61.0°61.6°61.0°
Effective seat tube angle77.1° 76.5°77.1°76.5°77.1°76.5°
C — Head tube length11.7 11.711.711.711.711.7
D — Head angle63.6° 63.0°63.6°63.0°63.6°63.0°
E — Effective top tube58.6 58.761.761.865.265.3
F — Bottom bracket height35.9 3535.93535.935
G — Bottom bracket drop1.2
H — Chainstay length43.5 43.944.144.544.845.2
I — Offset4.6
J — Trail13.1 13.613.113.613.213.6
K — Wheelbase124.3 124.6127.4127.7130.9131.2
L — Standover75.5 74.775.975.175.774.9
M — Frame reach44.7 4447.246.549.949.3
N — Frame stack63.4 63.963.463.963.463.9
SizeRider HeightInseam
R1 5'3" - 5'9" 30" - 32"
R2 5'9" - 6'2" 32" - 35"
R3 6'1" - 6'5" 34" - 36"


Frame Alpha Platinum Aluminum, high main pivot, idler pulley, integrated frame protection, internal or external routing, magnesium rocker link, Mino Link, ISCG 05 2-bolt mount, Active Braking Pivot, 157x12mm thru axle, 200mm travel
Rear Shock Marzocchi Bomber, 450lb spring, 250mm x 72.5mm

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Deep Dark Blue to Alpine Blue Fade / R1 / 29-inch 745889027662 5288398 SES41847297E
Deep Dark Blue to Alpine Blue Fade / R2 / 29-inch 745889027587 5288399 SES41384743E
Deep Dark Blue to Alpine Blue Fade / R3 / 29-inch 745889027563 5288400 SES41740470E