Bontrager Tire Pressure — Correct Pressure for Bontrager Bike Tires
Bontrager R3 Hard-Case Lite road in 700×25 runs 90–125 PSI tubed, or 70–95 PSI tubeless. GR1 Team Issue gravel in 700×40c runs 28–50 PSI tubeless. SE4 Team Issue trail runs 18–26 PSI tubeless at the optimal end. SE5 Team Issue enduro runs 18–27 PSI tubeless. XR4 Team Issue trail/enduro spans 18–30 PSI tubeless. Team Issue (120 TPI) and Expert (60 TPI) casings share the same marked range but the TI casing feels more compliant at lower pressures.
Bontrager Casing Architecture — Team Issue vs Expert
120 TPI Team Issue and 60 TPI Expert — same pressure range, different compliance and weight
Bontrager is Trek's house tire brand, and its lineup covers every discipline from road racing to gravity enduro. The most important variable for pressure setting is the casing designation, which determines how the tire responds to low pressure and what minimum PSI keeps the casing structurally sound.
Team Issue Casing (120 TPI)
Team Issue is Bontrager's performance-tier construction: 120 threads per inch, lightweight bead, and a thinner sidewall rubber layer. The higher TPI count makes the casing more supple and better able to conform to terrain at a given pressure. A Team Issue tire at 22 PSI will deform over rocks and roots more naturally than an Expert casing at the same pressure. Team Issue is the correct choice for weight-conscious riders and racers who want maximum ride quality.
Because the sidewall is thinner, Team Issue tires are slightly more vulnerable to cuts and abrasion. Riders who routinely ride in rocky or thorny terrain may prefer Expert casing for its durability despite the weight penalty.
Expert Casing (60 TPI)
Expert is Bontrager's endurance tier: 60 TPI, heavier sidewall rubber, more puncture-resistant construction. Expert casings can handle the same minimum tubeless pressure as Team Issue equivalents but feel stiffer and less compliant. The sidewall stiffness of an Expert casing means it resists deformation under lateral load better at moderate pressures — useful for heavier riders and rough terrain where rim strikes are a concern.
TLR (Tubeless Ready)
All current Bontrager MTB and gravel tires carry TLR designation, confirming they are tubeless-ready. Road tires with TLR rating work with standard tubeless rim tape and valves without a liner. Non-TLR tires require a tube and cannot be safely converted to tubeless.
Bontrager Road Tire Pressure
R3 and CX road tires — high pressure, tubed or tubeless depending on model
| Model | Width | Casing | Tubed PSI | Tubeless PSI | Notes |
|---|---|---|---|---|---|
| R3 Hard-Case Lite | 700×25c | TLR | 95–125 | 72–90 | Road race / training |
| R3 Hard-Case Lite | 700×28c | TLR | 90–120 | 68–88 | Road training |
| R3 Hard-Case Lite | 700×32c | TLR | 80–110 | 60–80 | Road / light gravel |
| CX4 Team Issue | 700×32c | TLR | 70–95 | 55–75 | Road / cx |
| Aeolus Pro | 700×28c | TLR | 85–115 | 65–85 | Aero road training |
| R3 Hard-Case Lite | 700×35c | TLR | 70–100 | 55–75 | Road / light gravel |
Bontrager's hookless-compatible road tires (Aeolus, CX4 on hookless rims) are subject to the ETRTO 72.5 PSI / 5.0 bar hookless maximum. Confirm your rim type before inflating above that threshold.
Bontrager Gravel Tire Pressure — GR Series
GR1 and GR2 Team Issue — wide pressure range for mixed terrain from hardpack to rough gravel
| Model | Width | Casing | Tubed PSI | Tubeless PSI | Surface |
|---|---|---|---|---|---|
| GR1 Team Issue | 700×35c | TLR | 40–70 | 28–50 | Mixed gravel / hardpack |
| GR1 Team Issue | 700×40c | TLR | 38–65 | 26–48 | Mixed gravel |
| GR2 Team Issue | 700×40c | TLR | 38–65 | 26–48 | Rough gravel |
| GR2 Team Issue | 700×45c | TLR | 35–60 | 24–45 | Adventure / rough gravel |
| GR2 Team Issue | 650b×47c | TLR | 32–55 | 22–42 | Bikepacking / rough gravel |
| GR2 Expert | 700×40c | TLR | 40–68 | 28–50 | Rough gravel / endurance |
Gravel riders frequently run front pressure 3–5 PSI lower than rear to increase front end compliance and steering feedback. On full gravel or loose surface, the lower third of the tubeless range (22–30 PSI) maximises grip. On hardpack and packed gravel roads, 38–45 PSI tubeless rolls significantly faster.
Bontrager MTB Trail Tire Pressure — XR Series
XR2, XR3, and XR4 — trail and all-mountain tires with tubeless-first pressure guidance
| Model | Width | Casing | Tubed PSI | Tubeless PSI | Discipline |
|---|---|---|---|---|---|
| XR2 Expert | 29×2.2 | TLR | 30–50 | 20–30 | Trail / XC |
| XR2 Expert | 27.5×2.35 | TLR | 28–48 | 18–28 | Trail |
| XR3 Team Issue | 29×2.3 | TLR | 26–45 | 18–28 | Trail |
| XR4 Team Issue | 29×2.4 | TLR | 24–42 | 18–28 | Trail / all-mountain |
| XR4 Team Issue | 27.5×2.4 | TLR | 24–42 | 18–28 | Trail / all-mountain |
| Chuck | 29×2.6 | TLR | 22–38 | 16–26 | All-mountain |
| Chupacabra | 29×3.0 | TLR | 18–32 | 12–20 | Plus / all-mountain |
Bontrager MTB Enduro Tire Pressure — SE Series
SE4 and SE5 Team Issue — Bontrager's enduro and gravity tires designed for 18–26 PSI tubeless operation
| Model | Width | Casing | Tubed PSI | Tubeless PSI | Discipline |
|---|---|---|---|---|---|
| SE4 Team Issue | 29×2.4 | TLR | 26–42 | 18–26 | Enduro front / rear |
| SE4 Team Issue | 27.5×2.4 | TLR | 26–42 | 18–26 | Enduro |
| SE5 Team Issue | 29×2.5 | TLR | 24–40 | 18–27 | Enduro / gravity |
| SE5 Team Issue | 27.5×2.5 | TLR | 24–40 | 18–27 | Enduro / gravity |
| Gnarwall Team Issue | 27.5×2.6 | TLR | 22–38 | 16–24 | Gravity / park |
| G5 Team Issue | 27.5×2.5 | TLR | 22–38 | 17–25 | Enduro |
SE5 is the most searched Bontrager tire for pressure guidance. The most common mistake is running it above 30 PSI tubeless — the tread block compliance that makes SE5 effective only activates when the casing can deform. At 22–25 PSI tubeless, SE5 generates maximum traction on loose and loamy terrain. Increase to 26–28 PSI on hardpack or when carrying more than 90 kg total rider weight.
Front vs Rear Pressure — Bontrager MTB Setup
Front and rear pressures are not the same — front runs lower for steering feel, rear runs higher for support
Bontrager MTB tires are designed to run with different front and rear pressures. The standard starting point from Trek's own setup guides:
- Front tire: Start at the lower third of the tubeless range. SE5 front: 18–21 PSI.
- Rear tire: Add 2–3 PSI above the front. SE5 rear: 21–25 PSI.
- Rider weight adjustment: Add 1 PSI per 5 kg above 75 kg rider weight.
- Terrain adjustment: Add 2–3 PSI on hardpack; subtract 2–3 PSI on loose or wet terrain.
Running front and rear at the same pressure is one of the most common setup errors. The front carries less weight and needs lower pressure to generate adequate steering feedback; the rear carries more weight and needs slightly higher pressure to resist bottoming.
Frequently Asked Questions
What PSI for Bontrager SE5 Team Issue enduro tires?
Bontrager SE5 Team Issue in 29×2.5 runs 18–27 PSI tubeless. Most riders find 20–22 PSI front and 23–26 PSI rear optimal for enduro conditions. The casing needs to be soft enough to conform — running above 28 PSI reduces the traction that makes SE5 effective. Add 2–3 PSI if riding hardpack or if total system weight exceeds 90 kg.
What PSI for Bontrager GR1 Team Issue gravel tires?
Bontrager GR1 Team Issue in 700×40c runs 26–48 PSI tubeless. For typical mixed gravel, a 70 kg rider will set 30–38 PSI and adjust by terrain. Rough gravel and wet conditions call for 26–32 PSI. Hardpack or tarmac sections ride faster at 38–45 PSI. Tubed, add 8–12 PSI above the tubeless figure.
What is the difference between Bontrager Team Issue and Expert casing for pressure?
Both casing tiers carry the same marked pressure range — Team Issue (120 TPI) and Expert (60 TPI) have the same structural limits. The practical difference is ride quality: Team Issue at 22 PSI feels more supple and compliant because the finer carcass deforms more easily. Expert at 22 PSI feels stiffer. Most riders find they can run Team Issue 1–2 PSI lower than Expert and achieve the same ride feel.
What PSI for Bontrager R3 Hard-Case Lite road tires?
Bontrager R3 Hard-Case Lite in 700×28c runs 90–120 PSI tubed or 68–88 PSI tubeless. Lighter riders (under 65 kg) can ride tubed at 90–100 PSI. Heavier riders (over 85 kg) benefit from 110–120 PSI to prevent pinch flats. Tubeless R3 runs 10–15% below the equivalent tubed pressure for the same performance.
Can I run Bontrager MTB tires on hookless rims?
Yes, all current Bontrager TLR tires are ETRTO-compatible and safe on hookless rims within the 72.5 PSI / 5.0 bar hookless maximum. For MTB tires at typical trail and enduro pressures (18–30 PSI), hookless rims impose no practical limit. The 72.5 PSI cap only affects road tires — trail and enduro pressures are well below it.
What PSI for Bontrager XR4 Team Issue trail tires?
Bontrager XR4 Team Issue in 29×2.4 runs 18–28 PSI tubeless for trail use. A good starting point for a 75 kg rider is 20 PSI front and 23 PSI rear. Increase rear to 25–27 PSI on sustained climbs or hardpack. Decrease to 18–19 PSI front on technical descents where traction is the priority.
Related Guides
The Complete Bike Tire Pressure Guide
Master reference covering PSI for every bike type — road, MTB, gravel, e-bike, fat bike, and tubeless setups.
Mountain Bike Tire Pressure Guide
XC, trail, enduro, and DH pressure recommendations with casing and width adjustments.
Tubeless MTB Tire Pressure
How tubeless changes your pressure setup and the exact PSI to run by casing and discipline.
Gravel Bike Tire Pressure Guide
Pressure tables for gravel riding by tire width, surface type, and tubeless vs tubed setup.
Maxxis Tire Pressure Guide
EXO vs DoubleDown casing breakdown and pressure tables for Minion, Aggressor, Rekon, and more.