MAKSTTON Vehicle Fitment Guide

Xiaomi N90 Wheel Fitment Guide

By MAKSTTON Technical Department · October 2026

This guide is based on workshop measurements from a 2026 Xiaomi N90 and covers PCD, center bore, wheel bolts, valve stems, factory 21-inch wheels, fender clearance, wheel load requirements, and 20/21/22-inch forged-wheel recommendations. The gross vehicle weight rating is 3,361 kg. Measurements were taken with the air suspension at its lowest setting.

View Recommended Fitment
Brown Xiaomi N90 fitted with MAKSTTON FG BO HZ8 forged wheels, front three-quarter view

Xiaomi N90 Fitment at a Glance

Fitment Item MAKSTTON Reference
Bolt Pattern (PCD) 5×120
Factory nominal center bore 64.55 mm
Measured wheel center bore 64.677 mm
Measured hub diameter 64.51 mm
Recommended center bore 64.55 mm
Factory 21″ front and rear wheels 21×8.5J ET42
Factory tires 255/45R21 / 265/45R21
Minimum wheel load rating ≥ 1008 kg per wheel
View body identification plate
Xiaomi N90 body identification plate showing 3,361 kg GVWR with the VIN concealed

Body identification plate, with the VIN concealed. Photo: MAKSTTON Technical Department

Factory Wheel and Tire Specifications

The measured 2026 N90 uses the same 21-inch wheel specification front and rear, with different tire widths:

Position Wheel Size Offset Tire Specification
Front 21×8.5J ET42 255/45R21
Rear 21×8.5J ET42 265/45R21
View factory wheel images
2026 Xiaomi N90 factory 21-inch 21×8.5J ET42 wheel, photo 1

Factory wheel photo 1. Photo: MAKSTTON Technical Department

2026 Xiaomi N90 factory 21-inch 21×8.5J ET42 wheel, photo 2

Factory wheel photo 2. Photo: MAKSTTON Technical Department

Bolt Pattern and Center Bore

The Xiaomi N90 uses a 5×120 bolt pattern (PCD). The factory nominal center bore is 64.55 mm. The measured wheel center bore is 64.677 mm, and the measured hub diameter is 64.51 mm. MAKSTTON recommends a custom wheel center bore of 64.55 mm for this vehicle.

Specification Value
Bolt Pattern (PCD) 5×120
Factory nominal center bore 64.55 mm
Measured wheel center bore 64.677 mm
Measured hub diameter 64.51 mm
Recommended wheel center bore 64.55 mm

Measurement method: micrometer measurement of the wheel center bore. Vehicle assembly tolerances and measurement position may cause slight differences between vehicles.

View center-bore measurement image
Measuring the Xiaomi N90 wheel center bore with a micrometer

Measuring the wheel center bore with a micrometer. Photo: MAKSTTON Technical Department

Xiaomi N90 Wheel-Bolt Specifications

Fastener Item Specification
Thread specification M14×1.5
Thread length 31 mm
Seat type 60° conical seat
Strength grade Grade 10
Socket size 21 mm
View bolt and nut measurement images
Measuring Xiaomi N90 M14×1.5 wheel bolt 31 mm thread length

Measuring bolt thread length. Photo: MAKSTTON Technical Department

Checking Xiaomi N90 wheel bolt thread pitch with a thread gauge

Checking thread pitch with a thread gauge. Photo: MAKSTTON Technical Department

Xiaomi N90 Grade 10 wheel nut strength marking

Wheel nut strength grade. Photo: MAKSTTON Technical Department

Measuring Xiaomi N90 wheel nut overall length

Wheel nut overall length. Photo: MAKSTTON Technical Department

Valve Stem and TPMS

The N90 uses rubber valve stems from the factory. Aftermarket wheels require compatible metal valve stems. If the original valve stem is metal, it may be reused. Before installation, confirm compatibility with the wheel valve hole and the tire pressure monitoring sensor.

View valve stem images
Xiaomi N90 factory rubber valve stem and TPMS sensor

Factory valve stem. Photo: MAKSTTON Technical Department

Xiaomi N90 valve stem mounting position for TPMS compatibility

Valve stem mounting position, parallel to the wheel rim. Photo: MAKSTTON Technical Department

Wheel Load Requirement

The factory wheels do not display a load rating. MAKSTTON therefore estimates the minimum wheel load rating using a 1.2 safety factor based on the 3,361 kg gross vehicle weight rating:

3,361 kg ÷ 4 × 1.2 = 1008.3 kg

MAKSTTON recommends a minimum load rating of 1008 kg per wheel for standard aftermarket wheels.

For forged wheels, MAKSTTON uses a higher 1.3 load factor:

3,361 kg ÷ 4 × 1.3 = 1092.3 kg

MAKSTTON recommends a minimum load rating of 1092 kg per wheel for forged aftermarket wheels.

Before selecting a wheel, also verify the manufacturer's published load rating, mounting method, and the vehicle's actual fully loaded condition.

Measured Wheel-to-Fender Clearance

Measurements were taken with the air suspension at its lowest setting. Values are in mm.

Measurement Front left Front right Rear left Rear right
Fender lip to wheel edge 20 18 25 20
Fender lip to tire sidewall 17 14 20 16
Suspension height 55 57 72 72

Front inner tire sidewall-to-suspension clearance is approximately 1.5 fingers. Vehicle assembly tolerances may cause differences between the left and right sides.

View fender clearance images
Measuring Xiaomi N90 front fender lip to tire sidewall clearance

Measuring fender lip to tire sidewall clearance. Photo: MAKSTTON Technical Department

Measuring Xiaomi N90 front fender lip to 21-inch wheel edge clearance

Measuring fender lip to wheel edge clearance. Photo: MAKSTTON Technical Department

MAKSTTON Custom Fitment Recommendation

The following configurations are based on factory tires or the corresponding wider tire options. In each configuration, the wheel edge sits inside the fender:

Configuration Tire Specification Front Wheel Rear Wheel Wheel-Edge Position
20-inch wider tire 265/50R20 20×9.0J ET30 20×9.0J ET30 Approx. 0–4 mm inside
21-inch factory tire, option 1 255/45R21 / 265/45R21 21×8.5J ET29 21×9.0J ET30 Approx. 5–10 mm inside
21-inch factory tire, option 2 255/45R21 / 265/45R21 21×9.0J ET33 21×9.0J ET33 Approx. 3–8 mm inside
21-inch wider tire 275/45R21 21×9.0J ET33 21×9.0J ET33 Approx. 3–8 mm inside
22-inch wider tire 285/40R22 22×9.0J ET33 22×9.0J ET33 Approx. 3–8 mm inside

20-Inch Configuration: 3D Clearance Check

With the 20×9.0J ET30 / 265/50R20 configuration, the wheel-to-double-wishbone clearance is approximately 11.86 mm. The installed tire is expected to protrude outward by approximately 6 mm.

View 20-inch 3D simulation
Xiaomi N90 20×9.0J ET30 wheel with 265-section-width tire, 3D simulation

20×9.0J ET30 with a 265-section-width tire, 3D simulation.

22-Inch Configuration and Limitation

Do not use the 22×9.5J ET39 / 285/40R22 configuration. In the 3D simulation, wheel-to-double-wishbone clearance is only approximately 3.9 mm, and the tire contacts the suspension arm. Use the 22×9.0J ET33 specification as the reference fitment instead.

View 22-inch 3D simulation
Xiaomi N90 22×9.5J ET39 wheel with 285-section-width tire, 3D simulation

22×9.5J ET39 with a 285-section-width tire, 3D simulation showing insufficient suspension clearance.

Real-World Xiaomi N90 Fitment Case

Case 01 — MAKSTTON FG BO HZ8

Black Xiaomi N90 fitted with MAKSTTON FG BO HZ8 22-inch wheels
View More Fitment Photos & Installation Details →
Item Front Rear
Wheel Model MAKSTTON FG BO HZ8
Wheel 22×9.0J ET33 22×9.0J ET33
Tire 285/40R22 285/40R22

MAKSTTON Vehicle Measurement Record

This measurement record documents wheel dimensions, tire specifications, fender clearance, suspension and brake-disc dimensions, center bore, and thread specifications for reviewing future custom-wheel configurations.

2026 Xiaomi N90 wheel fitment measurement data sheet with front and rear specifications
Measurement data sheet. Completed by: MAKSTTON Technical Department

Frequently Asked Questions

What are the Xiaomi N90 bolt pattern and center bore?

The Xiaomi N90 uses a 5×120 bolt pattern (PCD). The factory nominal center bore is 64.55 mm. The measured wheel center bore is 64.677 mm, and the measured hub diameter is 64.51 mm. MAKSTTON recommends a custom wheel center bore of 64.55 mm for this vehicle.

What are the factory Xiaomi N90 wheel and tire specifications?

The measured vehicle uses 21×8.5J ET42 wheels at both the front and rear. The front tires are 255/45R21, and the rear tires are 265/45R21.

What minimum wheel load rating does the Xiaomi N90 require?

Using the 3,361 kg gross vehicle weight rating and a 1.2 safety factor, MAKSTTON recommends a minimum load rating of 1008 kg per wheel for standard aftermarket wheels. For forged wheels using a 1.3 factor, the recommended minimum is 1092 kg per wheel.

Will the 20-inch wider-tire configuration contact the suspension?

In the documented 20×9.0J ET30 / 265/50R20 3D simulation, wheel-to-double-wishbone clearance is approximately 11.86 mm. The installed tire is expected to protrude outward by approximately 6 mm. Confirm the tire's actual section width and alignment before installation.

Why is 22×9.5J ET39 not recommended?

With a 285/40R22 tire, the 3D simulation shows only approximately 3.9 mm of wheel-to-double-wishbone clearance, and the tire contacts the suspension arm. The 22×9.0J ET33 / 285/40R22 specification should be used as the reference instead, subject to final dynamic-clearance checks on the actual vehicle.

Can the factory rubber valve stems be reused?

The N90 uses rubber valve stems from the factory. Aftermarket wheels require compatible metal valve stems. If the original valve stem is metal, it may be reused according to the actual mounting interface. Confirm tire-pressure-monitoring-sensor compatibility at the same time.

Can the factory wheel bolts be reused?

The factory wheel bolts are M14×1.5, with 31 mm thread length, a 60° conical seat, strength grade 10, and a 21 mm hex. They may be reused only when the new wheel's seat type and thread engagement match.

If you have questions, have found an error in this guide, or have verified additional fitment data, please contact MAKSTTON: info@makstton.com.

Zhenjie Duan, MAKSTTON Technical Department

Zhenjie Duan | Technical Department

Renbing Xiong, MAKSTTON Technical Department

Technical data: Renbing Xiong | Technical Department