Rear tire: 27.5×2.4.
Velopedia Bicycle Archive
2021 Kona Process 153 27.5
Original specifications: 27.5" wheels · geometry for 4 published sizes.
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At a glance
Archive #900001973- Model year
- 2021
- Category
- Mountain
- Original MSRP
- $3,199.00
- Sizes
- S, M, L, XL
- Colors
- Satin Fatigue Green w/ Gloss Yellow, Nicotine & Flame Fade Decals
- Geometry
- 4 manufacturer sizes
- In this record
- 22 specifications · archived image · original MSRP · geometry
Model history 2 other years
Browse other years
Compare side by side
Identification clues
2021 archived details
- Published colors
- Satin Fatigue Green w/ Gloss Yellow, Nicotine & Flame Fade Decals
- Frame
- Aluminum
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildAluminum · 27.5"
Frameset
| Frame Construction | Kona 6061 Aluminum Butted 153mm Travel |
|---|---|
| Frame Material | Aluminum |
| Fork | RockShox Yari RC Motion Control DebonAir 160mm Tapered 110mm Spacing |
| Rear Shock | RockShox Deluxe Select Plus Trunnion |
Drivetrain
| Shifters | SRAM SX-Eagle |
|---|---|
| Rear Derailleur | SRAM NX-Eagle |
| Crankset | SRAM SX-Eagle; Chainring: 32t X-Sync Eagle |
| Bottom Bracket | SRAM DUB PF92 |
| Cassette | SRAM NX-Eagle 11-50t 12spd |
| Chain | SRAM SX-Eagle |
Brakes
| Brakes | Brake Calipers: SRAM Guide T; Front Brake Rotor: SRAM Centerline 200mm; Rear Brake Rotor: SRAM Centerline 180mm; Brake Levers: SRAM Guide T |
|---|
Cockpit & Contact Points
| Headset | FSA No.57B |
|---|---|
| Handlebar | Kona XC/BC 35 |
| Stem | Kona XC/BC 35 |
| Saddle | Kona Trail |
| Seatpost | Trans-X Dropper +RAD Internal 31.6mm |
Wheels & Tires
| Hubs | (F) Formula 110x15mm / (R) Formula 148x12mm |
|---|---|
| Rims | WTB ST I30 TCS 2.0 |
| Spokes | Stainless Black 14g |
| Front Tire | Maxxis Assegai EXO TR DUAL 27.5x2.5" WT |
| Rear Tire | Maxxis Minion DHR II EXO TR DUAL 27.5x2.4" WT |
| Wheel Size | 27.5" |
No specifications match. Try a component name or clear your search.
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 15 measurements
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 385 mm | 410 mm | 450 mm | 485 mm |
| Top tube | 569 mm | 599 mm | 628 mm | 667 mm |
| Head tube | 123 mm | 134 mm | 145 mm | 156 mm |
| Head-tube angle | 64.5° | 64.5° | 64.5° | 64.5° |
| Seat-tube angle | 77° | 76.9° | 76.7° | 76.6° |
| Chainstay / rear center | 430 mm | 430 mm | 430 mm | 430 mm |
| Wheelbase | 1184 mm | 1213 mm | 1243 mm | 1283 mm |
| Bottom-bracket drop | 12 mm | 12 mm | 12 mm | 12 mm |
| Bottom-bracket height | 348 mm | 348 mm | 348 mm | 348 mm |
| Reach | 430 mm | 455 mm | 480 mm | 515 mm |
| Stack | 605 mm | 615 mm | 625 mm | 635 mm |
| Standover height | 690 mm | 700 mm | 710 mm | 720 mm |
| Fork offset / rake | 37 mm | 37 mm | 37 mm | 37 mm |
| Front center | 754 mm | 784 mm | 814 mm | 853 mm |
| Fork length / axle-to-crown | 552 mm | 552 mm | 552 mm | 552 mm |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Try your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts

SRAM GX Eagle 12-Speed Chain Silver, 126 links
Replacement option

Maxxis Assegai Wide Trail Dual Compound/EXO/TR 27.5in Tire Dual Compound/EXO/TR, 27.5x2.5
Replacement option

Maxxis Minion DHR II Wide Trail Dual Compound/EXO/TR 27.5in Tire Dual Compound/EXO/WT, 27.5x2.4
Model match
More parts (8)Fewer parts

SRAM DUB Pressfit Bottom Bracket MTB 92mm, Boost/Non-Boost
Replacement option
Chainring: 32t X-Sync Eagle
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Service essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Maxxis Assegai EXO TR DUAL 27.5x2.5" WTCheck: Verify the fitted tire’s size marking and rim type.
- Rear tire
- Maxxis Minion DHR II EXO TR DUAL 27.5x2.4" WTCheck: Verify the rear size; it may differ from the front.
- Drivetrain
- 12-speedCheck: Match the installed drivetrain family, not just its speed count.
- Seatpost diameter
- 31.6 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- SRAM DUB PF92Check: Verify shell type and width, crank interface, and spindle length or spacers.
Bike-specific inspection checklist 22 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: 2021 Kona Process 153 27.5 · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Kona 6061 Aluminum Butted 153mm Travel · Fork: RockShox Yari RC Motion Control DebonAir 160mm Tapered 110mm Spacing
Suspension
Evaluate the suspension →Archived: Fork: RockShox Yari RC Motion Control DebonAir 160mm Tapered 110mm Spacing · Rear shock: RockShox Deluxe Select Plus Trunnion
Drivetrain
Check drivetrain wear →Archived: Shifters: SRAM SX-Eagle · Rear derailleur: SRAM NX-Eagle · Crankset: SRAM SX-Eagle; Chainring: 32t X-Sync Eagle · Bottom bracket: SRAM DUB PF92 · Cassette: SRAM NX-Eagle 11-50t 12spd · Chain: SRAM SX-Eagle
Brakes
Inspect the brakes →Archived: Brakes: Brake Calipers: SRAM Guide T; Front Brake Rotor: SRAM Centerline 200mm; Rear Brake Rotor: SRAM Centerline 180mm; Brake Levers: SRAM Guide T
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: WTB ST i30 TCS 2.0 · Hubs: (F) Formula 110x15mm / (R) Formula 148x12mm · Front tire: Maxxis Assegai EXO TR DUAL 27.5x2.5" WT · Rear tire: Maxxis Minion DHR II EXO TR DUAL 27.5x2.4" WT
Controls and contact points
Archived: Headset: FSA No.57B · Handlebar: Kona XC/BC 35 · Stem: Kona XC/BC 35 · Seatpost: Trans-X Dropper +RAD Internal 31.6mm · Saddle: Kona Trail
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.


