Big on wheels, short on fuss. Hightower 4 C 90 is built as an all-terrain trail bike with a Carbon CC frame, balanced 150 mm rear / 160 mm front travel, and components chosen to handle everything from long alpine days to after-work laps on local trails.
Key highlights
- 150 mm rear / 160 mm front travel Carbon CC 29" VPP™ chassis tuned for modern trail riding.
- FOX 36 Float Performance, GRIP, 160 mm fork paired with a FOX Float X Performance shock for support on big hits and control on rough trails.
- Reserve 30|TR AL wheels laced to DT Swiss 370 hubs for a strong and serviceable wheelset.
- Maxxis Minion DHF / DHR II tires with 3C compounds and EXO / EXO+ casings for dependable cornering and braking traction.
Suspension & braking
- VPP™ rear suspension layout balances sensitivity, mid-stroke support, and bottom-out control for technical trails.
- 29" wheels front and rear for rollover confidence and stable high-speed handling.
- SRAM Maven Base brakes with SRAM HS2 180/200 mm rotors for consistent power on long descents.
- OneUp dropper post keeps the saddle out of the way when the trail points down.
Drivetrain & cockpit
- SRAM 90 Eagle T-Type drivetrain with XS 1275 10–52 t cassette for a wide gear range.
- SRAM 90 Eagle DUB T-Type crankset with 32 t chainring, set up on a SRAM DUB 73 mm MTB Wide bottom bracket.
- OneUp Aluminum handlebar and OneUp Enduro 42 mm stem for a familiar trail-ready cockpit.
- SDG Bel-Air V3 saddle and Santa Cruz house grips for a comfortable contact point setup.
Fit, setup, and recommended upgrades
- We want every rider, local or remote, to get the best performance out of their Hightower.
- Local pickup customers: We can set suspension sag, rebound, and tire pressures so the bike is tuned correctly for your weight and local terrain.
- Shipped bikes: The bike arrives professionally assembled and test ridden. If you need help with suspension or cockpit setup at home, our staff can walk you through the basics or answer questions before your first ride.
- Recommended upgrades: Many riders choose to add pedals, body protection, or cockpit adjustments (grips, bar width, stem length) to match their riding style. If you would like suggestions, we can help you choose options that match your riding style and the Hightower platform.
Hightower 4 C 90 – Full specifications
Frame
| Frame | Carbon CC 29" 150 mm Travel VPP™ |
Suspension
| Fork | FOX 36 Float Performance, GRIP, 160 mm |
| Rear Shock | FOX Float X Performance, 230 x 57.5 |
Wheels & tires
| Rims/Wheels | Reserve 30|TR AL |
| Hubs | [F] DT Swiss 370, 15x110, 6-Bolt, 28 h [R] DT Swiss 370, 12x148, XD, 6-Bolt, 36 t, 28 h |
| Spokes | N/A |
| Tires | [F] Maxxis Minion DHF 29"x2.5" WT, 3C MaxxGrip, EXO [R] Maxxis Minion DHR II 29"x2.4", 3C MaxxTerra, EXO+ |
Drivetrain
| Crankset | SRAM 90 Eagle DUB T-Type crankset |
| Chainrings | 32 t |
| Chain Guide | N/A |
| Bottom Bracket | SRAM DUB 73 mm MTB Wide BB |
| Chain | SRAM GX Eagle T-Type, Flattop, 12-speed |
| Rear Derailleur | SRAM 90 Eagle T-Type, 12-speed |
| Cassette | SRAM XS 1275 Eagle T-Type, 10–52 t |
| Shifters | SRAM 90 Eagle T-Type, 12-speed |
| Pedals | Sold separately |
Brakes
| Brakes | SRAM Maven Base with SRAM HS2 180/200 mm rotors |
Cockpit
| Handlebars | OneUp Aluminum bar |
| Grips | Santa Cruz Bicycles house grips |
| Stem | OneUp Enduro stem, 42 mm |
| Saddle | SDG Bel-Air V3, Lux-Alloy |
| Seat Post | OneUp dropper post, 31.6 |
*Product specifications are subject to change without notice.
Sizing and fit
Height ranges and reach figures are based on the Santa Cruz Hightower sizing chart. If you are between sizes, compare stack and reach to a bike you already like.
| Size | Recommended height | Approx. reach |
|---|---|---|
| Small | 5'1" – 5'5" | 435 mm |
| Medium | 5'5" – 5'9" | 460 mm |
| Large | 5'9" – 6'1" | 480 mm |
| X-Large | 6'1" – 6'4" | 500 mm |
| XX-Large | 6'4" – 6'7" | 525 mm |
- Riders who want more stability often choose the larger of two possible sizes.
- Riders with longer legs and shorter torsos may prefer the smaller size in the range.
- If you are unsure, contact us with your height, inseam, and current bike for a sizing check.
Frame geometry (mm and degrees) Tap to open chart
| S | M | L | XL | XXL | |
|---|---|---|---|---|---|
| Reach (hi/lo) | 435 / 432 | 460 / 457 | 480 / 477 | 500 / 497 | 525 / 522 |
| Stack (hi/lo) | 623 / 625 | 632 / 634 | 641 / 643 | 659 / 661 | 668 / 670 |
| Head tube angle (hi/lo) | 64.2° / 63.9° | 64.2° / 63.9° | 64.2° / 63.9° | 64.2° / 63.9° | 64.2° / 63.9° |
| Head tube length | 110 | 120 | 130 | 150 | 160 |
| Rear center (hi/lo) | 434 | 436 | 439 | 442 | 445 |
| Front center (hi/lo) | 771 | 800 | 825 | 853 | 883 |
| BB height (hi/lo) | 344 / 341 | 344 / 341 | 344 / 341 | 344 / 341 | 344 / 341 |
| BB drop front (hi/lo) | 29 / 32 | 29 / 32 | 29 / 32 | 29 / 32 | 29 / 32 |
| BB drop rear (hi/lo) | 29 / 32 | 29 / 32 | 29 / 32 | 29 / 32 | 29 / 32 |
| Wheelbase (hi/lo) | 1206 | 1237 | 1264 | 1296 | 1328 |
| Top tube length (hi/lo) | 572 | 595 | 614 | 636 | 662 |
| Seat tube length | 380 | 405 | 430 | 460 | 500 |
| Seat tube angle (hi/lo) | 77.6° / 77.3° | 77.9° / 77.6° | 78.2° / 77.9° | 78.3° / 78.0° | 78.4° / 78.1° |
| Standover height (hi/lo) | 721 | 723 | 725 | 727 | 731 |
