Surly Krampus

Name: Surly Krampus
Brand: Surly

2018 MountainTrail Manufacturer page

Suspension: Rigid
Wheels: 29″
Drivetrain: 1 × 11 30t / 11–42t
Gear range: 382%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

12 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Surly 4130 Cro-Moly Steel. Custom double butted externally flaired tubing. Horizontal slotted with derailleur hanger, Surly “Gnot Boost” 142 or 148mm hub spacing compatibility Not identified

Suspension

1 part

Fork

483mm axle-to-crown x 47mm offset, 110mm hub spacing, tapered and butted straight blade, 4130 CroMoly. 51mm I.S. disc mount Not identified

Drivetrain

7 parts

Bottom bracket

73mm Not identified
Cassette
- SunRace
Chain
- KMC X11 11 speeds
Crankset
- SRAM NX 30t
Front derailleur

None
Rear derailleur
- SRAM NX
Shifters
- SRAM NX

Brakes

2 parts

Wheels and tires

4 parts

Front hub

110mm, 15mm thru-axle, sealed, 32h Not identified
Rear hub

148mm, 12mm thru-axle, sealed, 32h Not identified
Rims
- Alex Rims
Tires
- Surly

Cockpit and contact points

5 parts

Handlebar
- Answer
Headset
- Cane Creek
Saddle
- WTB Volt
Seatpost

2-bolt, 30.9 x 410mm Not identified
Stem

4-bolt, 31.8mm Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 426mm

Stack 602mm

Wheelbase 1113mm

Head angle 69.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	404	426	448	470
Stackmm	593	602	612	621
Top tube lengthmm	585	610	635	660
Seat tube lengthmm	375	425	475.5	525
Head tube lengthmm	90	100	110	120
Head tube angle	69°	69°	69°	69°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1086.8	1112.6	1138.3	1164
Front centermm	660	686	711	737
Bottom bracket dropmm	65	65	65	65
Bottom bracket heightmm	309	309	309	309
Standover heightmm	770	797	825	854
Fork rakemm	47	47	47	47
Trailmm	93	93	93	93
Stack/reach ratio	1.47	1.41	1.37	1.32

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 20.7 in
Highest gear: 79.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire clearance: Maximum tire width: 3″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

20.7 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2018
Sample: 845 bicycles with this information
Coverage: 90.0% of the class

Highest gear

79.1 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2018
Sample: 845 bicycles with this information
Coverage: 90.0% of the class

Shifting

Mechanical

25 of 938 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2018
Sample: 938 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.9 km/h
Highest gear: 30.3 km/h

Total gear range 382%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 20.7–79.1 gear inches
Class reference (p10–p90): 16.5–93.5 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2018
Lowest gear: 845 bicycles with this information, 90.0% of the class
Highest gear: 845 bicycles with this information, 90.0% of the class