• Salsa Blackthorn Aluminum 125 Full Suspension MTB - Vapor Gray - Side Profile View
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Blackthorn 125 Eagle 70 Transmission

Blackthorn 125 Eagle 70 Transmission

$3,499.00 USD
$0.00 USD $3,499.00 USD
Size

Blackthorn 125 Eagle 70 Transmission is all about balanced performance. Its aluminum frame features our trail geometry: a slack 64.7-degree head angle for downhill stability and a steep 78.3-degree seat tube for comfortable seated climbing. The 125mm rear suspension travel comes via our Split Pivot system, which optimizes both pedaling and braking performance for excellent pedaling efficiency and braking traction. A 140mm-travel RockShox Pike fork up front helps tame technical trails for a smooth, controlled ride.

Blackthorn’s cargo mounts let you load up for longer rides: fit two bottles, a repair kit, snacks, and other essentials without worrying where it’ll all go at the last minute (and leave the sweaty hip pack at home). The SRAM Eagle 70 drivetrain is durable enough for all your adventures and makes it easy to find the right gearing for the trail’s ups and downs. Is this one of the best aluminum trail bikes for riders who want a little of everything in an MTB? Throw a leg over Blackthorn 125 and see why we think so.

Warning for Residents of California

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Product Details

Build Kit

Frameset

  • Frame

    Blackthorn 125 Aluminum

  • Color

    Vapor Gray

  • Suspension Fork

    RockShox Pike, 44mm offset, 140mm

  • Rear Shock

    RockShox Deluxe Select+, 2P, 190 x 45mm

Components

  • Headset

    FSA Orbit 1.5E ZS NO.57E

  • Seatpost

    TranzX YSI-05 adjustable-travel dropper w/ GL Matchmaker X lever

  • Stem

    Salsa Guide 35.0

  • Grips/Bar Tape

    Salsa file tread lock-on

  • Saddle

    WTB Solano Steel Hybrid Fusion, medium

  • Handlebar

    Alloy, 35.0mm

Drivetrain

  • Front Derailleur

    N/A

  • Rear Derailleur

    SRAM Eagle 70 Transmission

  • Chain guide

    Yes

  • Cassette

    SRAM XS-1270 Transmission, 10–52t, 12-speed

  • Chain

    SRAM Eagle 70 Transmission Flattop

  • Crankset

    SRAM Eagle 70 Transmission, 30t

  • Shifter

    SRAM Eagle 70 Transmission

  • Brake Levers

    SRAM DB6

  • Brake Calipers

    SRAM DB6, 4-piston

  • Bottom Bracket

    SRAM DUB MTB Wide, BSA

  • Rotors

    SRAM CenterLine 2.0 (6-bolt, 200mm front, 180mm rear)

Wheels

  • Front Tire

    Teravail Kessel 29 x 2.5", 60TPI Durable casing, Grip Plus compound (WTB TCS valve and sealant included)

  • Rear Tire

    Teravail Clifty 29 x 2.5", 60TPI Durable casing, Grip Plus compound (WTB TCS valve and sealant included)

  • Front Hub

    WTB Frequency 3X 15 x 110mm

  • Rear Hub

    WTB Frequency 3X 12 x 148mm

  • Rim

    WTB ST i30 TCS, 32h, 29"

Weight

  • Complete Bike

    34lb 7oz

*Specifications are subject to change without notice

Geometry

Geometry Diagram
SizeSmallMediumLargeX-Large
A. Effective Top Tube 587.0- 588.0 609.0- 610.0 631.0- 632.0 653.0- 654.0
B. Stand Over 735.3- 733.0 735.7- 733.0 736.0- 733.0 736.3- 733.0
C. Reach 462.0- 458.0 482.0- 478.0 502.0- 498.0 521.0- 518.0
D. Stack 602.4- 609.0 611.2- 617.0 620.0- 626.0 628.7- 635.0
E. Total Seat Tube Length 405.0 430.0 455.0 480.0
F. Headtube Length 100.0 110.0 120.0 130.0
G. Headtube Angle
64.7
-
64.4
64.7
-
64.4
64.7
-
64.4
64.7
-
64.4
H. Seat Tube Angle
78.3
-
77.9
78.2
-
77.9
78.2
-
77.9
78.2
-
77.9
I. BB Drop 32.0- 36.0 32.0- 36.0 32.0- 36.0 32.0- 36.0
J. BB Height 344.0- 340.0 344.0- 340.0 344.0- 340.0 344.0- 340.0
K. Chainstay Length 432.0- 433.0 432.0- 433.0 432.0- 433.0 432.0- 433.0
L. Fork Length Axle to Crown 551.0 551.0 551.0 551.0
M. Fork Offset 43.0 43.0 43.0 43.0
N. Wheelbase 1210.0- 1211.0 1234.0- 1235.0 1258.0- 1260.0 1283.0- 1284.0
Crank Arm Length 165.0 165.0 165.0 165.0
Handlebar Width 780.0 800.0 800.0 800.0
Recommended Rider Height 157.0 - 170.0 168.0 - 180.0 178.0 - 191.0 188.0 - 201.0
Stem Length 40.0 40.0 40.0 40.0

Measurements based on:

  • an unsprung bike (no sag)
  • a 29 x 2.5" tire measuring 752mm in diameter
  • Standover is measured from vertically from ground to top of top tube 50mm forward of bottom bracket center
  • Note: Where two measurements are listed, the first number is with Flip Chip in default High position; the second number is with Flip Chip in Low position

Size Guide

Blackthorn Size Chart (PDF)

Frame Specs

  • Design Wheel/Tire Sizes 55–63.5mm (2.2–2.5")
  • Alternate Wheel/Tire Sizes 584/27.5" Rear Wheel Only* 63–70mm (2.5–2.7")
  • Max Tire Outer Diameter Tire Clearance Frame: 29 x 2.5"
    Tire Clearance Fork: Max Tire Diameter: 732 mm / Max Tire Width: 81mm
  • Frame Construction 6061-T6 hydroformed aluminum
  • Suspension Fork Length (Travel) 551mm A2C (140mm travel)
  • Fork Offset 44mm
  • Rear Spacing 12 x 148mm
  • Rear Axle Size 12 x 188mm, TP=1.0, TL=20
  • Rear Brake (Rotor) 74mm post-mount (180–200mm rotor)
  • Front Brake (Rotor) 74mm post-mount (180–220mm rotor)
  • Headset - Upper ZS44/28.6
  • Headset - Lower ZS56/40
  • Rear Shock Size 190 x 45mm
  • Shock Mount, Fore Ø10 x 30mm
  • Front Spacing 15 x 110mm
  • Front Axle Size RockShox Maxle Stealth: 15 x 158mm, TP=M15 x 1.5, TL=9mm
  • Steerer Tube 1.125–1.5" Tapered
  • Crown Race 59mm
  • Seatpost 30.9mm
  • Dropper Post Compatible Yes (internal)
  • Seatpost Clamp 35.0mm
  • Max Post Insertion SM: 215mm; MD: 240mm; LG: 265mm; XL: 290mm
  • Derailluer Hanger SRAM UDH
  • Bottom Bracket 73mm BSA
  • Crankset (Max Ring) 34t (55mm)
  • Accessory Mounts Top Tube Accessory Mounts: 1
  • Bottle Mounts 2

Supportive Documents

Support Document links

Additional Features

Split Pivot rear suspension design

Split Pivot provides a host of impressive suspension characteristics because the system isolates pedaling forces and braking forces from each other, allowing us to tune and optimize the bike for both independently. The concentric rear axle pivot, in conjunction with precise wheel link, brake link, and control link placement, results in excellent bump compliance and pedaling efficiency, smooth and predictable braking throughout travel, and maximum traction

Split Pivot + design methodology

The Split Pivot+ design methodology allows our engineers to optimize a frame for more than one travel class. This means that Blackthorn 125 riders can swap control and shock links, in addition to the rear shock and fork, to switch travel to Blackthorn 145's 145mm rear and 160 mm front capability. One frame, multiple bikes.

Purpose-tuned suspension

Blackthorn-specific control link and shock links optimize the frame geometry and kinematics for its suspension travel, delivering a well-rounded, balanced trail feel

Progressive leverage rate

Blackthorn is designed with a progressive leverage rate that offers plenty of bottom out performance at the end of the stroke, promoting more confidence and control on bigger hits and a deeper feel to the travel. The beginning and mid-stroke provide extremely supple small bump compliance off the top for a smooth ride and consistent mid-travel support to help combat rider fatigue and maintain bike geometry.

Trail Geometry

Blackthorn 125 balances descending confidence with pedaling performance for all-around riding. A 64.7-degree head tube angle makes for a long front center, translating to stability when descending loose, steep trails or railing through rock gardens. Blackthorn’s steep 78.3-degree seat tube angle puts you in a comfortable pedaling position for flats and climbs. Short 432–433mm chainstays keep Blackthorn 125 feeling nimble.

Flip chip

A flip chip allows a simple and quick 5mm adjustment to bottom bracket height and 0.3-degree adjustment to head tube angle to account for your personal preference, terrain, or wheel size and tire diameter

6061-T6 aluminum frame

Heat-treated aluminum frame for stiffness and durability.

Top tube accessory mounts

Top tube mounts accommodate the Salsa EXP-R Series Trillium Top Tube Bag or K-Edge Top Tube Mount for bike computers

Fits two bottles on all sizes

Stay hydrated on long trail rides with space for two bottles on all frame sizes

Integrated repair kit location

Bring your multitool and tube without scuffing your frame or hauling around a hip pack

Versatile wheel and tire fit

Blackthorn features clearance for up to 29 x 2.5" tires and is compatible with mixed wheel sizes

Coil shock compatibility

Blackthorn is compatible with most coil shocks. See Supportive Documents for coil shock spring rate recommendations.

Molded frame protection

Molded rubber down tube, seat tube, chainstay, and seatstay guards protect your frame from impacts and abrasion

FAQ

How do I convert my Blackthorn between 125mm & 145mm rear travel?

To convert from 125mm of travel to 145mm of travel you will need a 210x55mm stroke shock, the 3056 Shock Link, and a fork or airshaft of your desired travel between 140-160mm. To convert from 145mm of travel to 125mm of travel you will need a 190x45mm stroke shock, the 3046 Shock Link, and a fork or airshaft of your desired travel between 130-140mm. Please see the Travel Conversion Instructions for Blackthorn 2.0 for more details.

Can I run a coil shock?

Yes, Blackthorn 2.0 uses a progressive leverage rate that is compatible with Air and Coil shocks. Please see the attached PDF with starting coil weight recommendations based on rider + gear weight.

Can I run a mixed-wheel setup on this bike?

Yes, we recommend running 165mm or shorter crank arms, the max fork lengths of 160mm for 145 or 140mm for 125, and leaving the flip hip in the default(high) position.

What length dropper post can I fit?

Dropper post length depends on multiple factors. Our friends at Park Tool have created a guide to help you determine the right size for your bike. Read the guide here.

How does the geometry change if I use a suspension fork with 130mm or 120mm of travel?

See the Blackthorn alternate fork travel geometry chart.

Do you offer touch-up paint?

No, we do not offer touch up paint. Hobby shops or automotive stores are excellent places to find paint. We suggest you test the paint on a scrap piece of metal before using it on your frame.

I crashed and dented (or cracked) my frame. Is it safe to ride?

Stop riding your frame immediately and take it to the nearest Salsa authorized dealer for inspection. A dented or cracked tube represents a structural weakening of the frame, and is a safety risk.

What is the warranty for this bike?

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Warranty Information

All Salsa products are warranted against manufacturing defects in materials and workmanship from the date of retail purchase of the product, subject to the limitations detailed below.

Review Warranty Info