Velopedia Bicycle Archive
2025 Salsa Blackthorn 145 C X0 Transmission
Mountain bicycle from the Velopedia specification archive.
- Original MSRP
- $8,999.00
- Sizes
- S, M, L, XL
- Colors
- Coffee Black / Sage
- Weight
- 31 lb. 13 oz.
- Geometry
- 4 manufacturer sizes · Ride analysis
- Archive ID
- 900000390
Current market
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Velopedia analysis
What the specifications mean
Suspension is concentrated at the fork, so fork setup and rear-tire pressure are the main tools for balancing front and rear behavior. Both 27.5- and 29-inch wheels appear in the record, but it does not establish a mixed front/rear build; confirm the correct diameter for the selected frame size. Electronic shifting removes the usual shift cable but adds a separate battery and controls, while the 520% cassette range describes how much gearing is available.
Suspension setup
Front only
Fork settings affect the front while rear-wheel behavior remains dependent on tire and wheel setup.
Wheel system
27.5 / 29 options
Both diameters are documented, but the archive does not prove a mixed front/rear setup.
Drivetrain
Electronic · 520% range
Shift-system battery state joins derailleur setup and sprocket compatibility as a troubleshooting variable.
Frame material
Carbon / composite
Look for impact damage and clamp marks rather than metal-style dents or rust.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.Inspect the frame and fork →
- BrakesTest each brake separately and confirm it stops firmly and releases cleanly. Inspect the pads and braking surfaces for wear or contamination, and check the cables or hoses for damage.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
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
Follow the full used-bike inspection order →Interpretation based on the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Frameset
| Frame Construction | Carbon |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | RockShox Lyric Ultimate, 160mm |
Drivetrain
| Shifters | SRAM AXS Pod controller, Right, w/ MatchMaker X Clamp |
|---|---|
| Front Derailleur | N/A |
| 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" |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| 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 |
Geometry source: Manufacturer HTML geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry interpretation
What this geometry means
The archived table contains multiple manufacturer geometry states. Velopedia preserves source order and analyzes each state separately rather than averaging the published values.
Small geometry
Configuration
Riding position
A 452 mm reach paired with 612 mm of stack gives this size a moderate frame proportion: roomy enough when standing without pushing strongly toward either a very low or very upright front end. Its 77.4° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.9° head angle combined with a 1219 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 2, this configuration steepens the head angle by 0.3°.
Archive context
Its reach of 452 mm sits toward the longer end. Its wheelbase of 1219 mm sits toward the longer end. The head angle of 63.9° sits toward the slacker end.
Riding position
A 452 mm reach paired with 612 mm of stack gives this size a moderate frame proportion: roomy enough when standing without pushing strongly toward either a very low or very upright front end. Its 77.1° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.6° head angle combined with a 1219 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 1, this configuration slackens the head angle by 0.3°.
Archive context
Its reach of 452 mm sits toward the longer end. The head angle of 63.6° sits toward the slacker end. Its wheelbase of 1219 mm sits toward the longer end.
Medium geometry
Configuration
Riding position
A 472 mm reach paired with 621 mm of stack gives this size a moderate frame proportion: roomy enough when standing without pushing strongly toward either a very low or very upright front end. Its 77.4° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.9° head angle combined with a 1243 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 2, this configuration steepens the head angle by 0.3°.
Archive context
Its reach of 472 mm sits toward the longer end. The seat angle of 77.4° sits toward the steeper end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end.
Riding position
A 472 mm reach paired with 621 mm of stack gives this size a moderate frame proportion: roomy enough when standing without pushing strongly toward either a very low or very upright front end. Its 77.1° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.6° head angle combined with a 1243 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 1, this configuration slackens the head angle by 0.3°.
Archive context
Its reach of 472 mm sits toward the longer end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The head angle of 63.6° sits toward the slacker end.
Large geometry
Configuration
Riding position
With 492 mm of reach and 630 mm of stack, the frame has a relatively long, low proportion that should leave plenty of room when standing and put the front end toward the lower side of modern mountain-bike fit. Its 77.4° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.9° head angle combined with a 1268 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 2, this configuration steepens the head angle by 0.3°.
Archive context
Its reach of 492 mm sits toward the longer end. The seat angle of 77.4° sits toward the steeper end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end.
Riding position
With 492 mm of reach and 630 mm of stack, the frame has a relatively long, low proportion that should leave plenty of room when standing and put the front end toward the lower side of modern mountain-bike fit. Its 77.1° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.6° head angle combined with a 1268 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 1, this configuration slackens the head angle by 0.3°.
Archive context
Its reach of 492 mm sits toward the longer end. Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The head angle of 63.6° sits somewhat slacker than typical.
X-Large geometry
Configuration
Riding position
With 512 mm of reach and 639 mm of stack, the frame has a relatively long, low proportion that should leave plenty of room when standing and put the front end toward the lower side of modern mountain-bike fit. Its 77.4° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.9° head angle combined with a 1292 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 2, this configuration steepens the head angle by 0.3°.
Archive context
Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The seat angle of 77.4° sits toward the steeper end. The chainstay of 432 mm sits somewhat shorter than typical.
Riding position
With 512 mm of reach and 639 mm of stack, the frame has a relatively long, low proportion that should leave plenty of room when standing and put the front end toward the lower side of modern mountain-bike fit. Its 77.1° effective seat angle places the seated rider relatively forward, a layout that generally helps keep body weight centered on steep climbs.
Handling tendencies
A 63.6° head angle combined with a 1292 mm wheelbase points to strongly stability-oriented steering and chassis behavior. The longer the chassis and slacker the front end, the more the bike tends to favor composure over very quick direction changes.
Configuration changes
Compared with Configuration 1, this configuration slackens the head angle by 0.3°.
Archive context
Its bottom-bracket drop of 25 mm sits toward the shallower-drop end. The head angle of 63.6° sits somewhat slacker than typical. The chainstay of 432 mm sits somewhat shorter than typical.
Geometry describes frame proportions and likely tendencies, not a ride test. Rider proportions, cockpit setup, tires, suspension settings, wheel configuration, and component choices can materially change how a bicycle fits and feels.
Gallery
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.