Velopedia Bicycle Archive
2025 Salsa Blackthorn 145 C X0 Transmission
Original specifications: 29"; 27.5" wheels · 31 lb. 13 oz. published weight · geometry for 4 published sizes.
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At a glance
- Model year
- 2025
- Category
- Mountain
- Original MSRP
- $8,999.00
- Sizes
- S, M, L, XL
- Colors
- Coffee Black / Sage
- Weight
- 31 lb. 13 oz.
- Geometry
- 4 manufacturer sizes
- In this record
- 21 specifications · 3 archived images · original MSRP · geometry
- Archive ID
- 900000390
Original buildCarbon Fiber · 29"; 27.5"
Frameset
| Frame Construction | Carbon |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | RockShox Lyric Ultimate, 160mm |
Drivetrain
| Shifters | SRAM AXS Pod controller, Right, w/ MatchMaker X Clamp |
|---|---|
| Rear Derailleur | SRAM X0 Eagle AXS Transmission |
| Crankset | SRAM X0 Eagle, 30t w/ MRP 1x iO SL ISCG-05 composite bashguard |
| Bottom Bracket | SRAM DUB BSA 73mm MTB Wide |
| Cassette | SRAM X0 Eagle Transmission, 10–52t, 12-speed |
| Chain | SRAM X0 Eagle Transmission Flattop |
Brakes
| Brakes | Brake Calipers: SRAM Maven Ultimate Stealth; Brake Levers: SRAM Maven Ultimate Stealth; Rotors: SRAM HS2 (6-bolt, 200mm front and rear) |
|---|
Cockpit & Contact Points
| Headset | FSA Orbit 1.5E ZS NO.57E |
|---|---|
| Handlebar | Salsa Guide Carbon |
| Stem | Aluminum CNC |
| Saddle | WTB Solano, Medium, Steel SL, Fusion Form |
| Seatpost | TranzX REVERSE w/ GL Stealth MMX Lever, SM: 160mm travel; MD: 180mm travel; LG–XL: 210mm travel |
Wheels & Tires
| Hubs | (F) WTB Solano, Medium, Steel SL, Fusion Form / (R) WTB Frequency 12 x 148mm |
|---|---|
| Rims | WTB CZR Carbon i30, 28h |
| Spokes | Double butted, black |
| Front Tire | Teravail Clifty, 29 x 2.5", Durable casing, WTB TCS Sealant Included |
| Rear Tire | Teravail Clifty, 29 x 2.5", Durable casing, WTB TCS Sealant Included |
| Wheel Size | 29"; 27.5" |
Geometry
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 17 measurements
| Measurement | Small | Medium | Large | X-Large |
|---|---|---|---|---|
| Seat tube | 405 mm | 430 mm | 455 mm | 480 mm |
| Effective top tube | 589 mm | 611 mm | 633 mm | 655 mm |
| Head tube | 100 mm | 110 mm | 120 mm | 130 mm |
| Head-tube angle | 63.9- 63.6 | 63.9- 63.6 | 63.9- 63.6 | 63.9- 63.6 |
| Seat-tube angle | 77.4- 77.1 | 77.4- 77.1 | 77.4- 77.1 | 77.4- 77.1 |
| Chainstay / rear center | 432 mm | 432 mm | 432 mm | 432 mm |
| Wheelbase | 1219 mm | 1243 mm | 1268 mm | 1292 mm |
| Bottom-bracket drop | 25 mm | 25 mm | 25 mm | 25 mm |
| Bottom-bracket height | 351 mm | 351 mm | 351 mm | 351 mm |
| Reach | 452 mm | 472 mm | 492 mm | 512 mm |
| Stack | 612 mm | 621 mm | 630 mm | 639 mm |
| Standover height | 746 mm | 746 mm | 747 mm | 747 mm |
| Fork offset / rake | 43 mm | 43 mm | 43 mm | 43 mm |
| Fork length / axle-to-crown | 571 mm | 571 mm | 571 mm | 571 mm |
| Crank length | 165 mm | 165 mm | 170 mm | 170 mm |
| Stem length | 40 mm | 40 mm | 40 mm | 40 mm |
| Handlebar width | 760 mm | 800 mm | 800 mm | 800 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts

SRAM X0 Eagle Transmission 12-Speed Chain Dark Polar, 126 links
126 links

SRAM XS-1295 X0 Eagle Transmission 12-Speed Cassette Black, 10-52t
10-52t

SRAM DUB BSA Bottom Bracket MTB Wide, BSA 68/73/73+
BSA 68/73/73+
More parts (5)

SRAM X0 Eagle AXS Transmission Rear Derailleur Black, 52T Max
52T Max
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2025 Salsa Blackthorn 145 C X0 Transmission · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Carbon · Fork: RockShox Lyric Ultimate, 160mm
Suspension
Evaluate the suspension →Archived: Fork: RockShox Lyric Ultimate, 160mm
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM AXS Pod controller, Right, w/ MatchMaker X Clamp · Rear derailleur: SRAM X0 Eagle AXS Transmission · Crankset: SRAM X0 Eagle, 30t w/ MRP 1x iO SL ISCG-05 composite bashguard · Bottom bracket: SRAM DUB BSA 73mm MTB Wide · Cassette: SRAM X0 Eagle Transmission, 10–52t, 12-speed · Chain: SRAM X0 Eagle Transmission Flattop
Brakes
Inspect the brakes →Archived: Brakes: Brake Calipers: SRAM Maven Ultimate Stealth; Brake Levers: SRAM Maven Ultimate Stealth; Rotors: SRAM HS2 (6-bolt, 200mm front and rear)
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29"; 27.5" · Rims: WTB CZR Carbon i30, 28h · Hubs: (F) WTB Solano, Medium, Steel SL, Fusion Form / (R) WTB Frequency 12 x 148mm · Front tire: Teravail Clifty, 29 x 2.5", Durable casing, WTB TCS Sealant Included · Rear tire: Teravail Clifty, 29 x 2.5", Durable casing, WTB TCS Sealant Included
Controls and contact points
Archived: Headset: FSA Orbit 1.5E ZS NO.57E · Handlebar: Salsa Guide Carbon · Stem: Aluminum CNC · Seatpost: TranzX REVERSE w/ GL Stealth MMX Lever, SM: 160mm travel; MD: 180mm travel; LG–XL: 210mm travel · Saddle: WTB Solano, Medium, Steel SL, Fusion Form
Before and during the test ride
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Gallery3 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




