Your cart
Your cart is empty
Continue shoppingMAKSTTON Vehicle Fitment Guide
XIAOMI SU7 Ultra Wheel Fitment Guide
Based on measured XIAOMI SU7 Ultra vehicles and verified installations, this guide covers wheel fitment for both the standard air-suspension setup and the factory coilover / track-package configuration. It includes the 5×114.3 PCD, 64.5mm center bore, factory 21-inch wheel and tire specifications, measured fender clearance, wheel fasteners, GVWR and recommended aftermarket offsets. The guide also documents wider track-focused setups, including 325- and 335-section rear-tire cases, with notes on the additional clearance provided by the factory coilovers and small widebody. Use the standard and track-package data separately, as suspension, inner clearance and fender position differ between configurations.
View Recommended Fitment
XIAOMI SU7 Ultra Fitment at a Glance
| Fitment Item | MAKSTTON Reference |
|---|---|
| Bolt Pattern (PCD) | 5×114.3 |
| Published Center Bore | 64.5mm |
| MAKSTTON Recommended Custom Wheel Center Bore | 64.55mm |
| Factory Wheel — Air Suspension | 21×9.5J ET39.5 (front) | 21×11J ET43 (rear) |
| Factory Tire — Air Suspension | 265/35R21 (front) | 305/30R21 (rear) |
| Factory Wheel — Coilover | 21×10J ET42 (front) | 21×12J ET42.5 (rear) |
| Factory Tire — Coilover | 265/35R21 (front) | 325/30R21 (rear) |
| Factory Wheel Fasteners | M14×1.5 lug nuts |
| Gross Vehicle Weight Rating | 2,810kg |
| Minimum Recommended Wheel Load Rating | ≥ 850kg per wheel |
Factory Wheel and Tire Specifications
The XIAOMI SU7 Ultra has two documented factory 21-inch configurations. Air suspension and coilover cars use different wheel widths, offsets and rear tire sizes, so the correct package must be confirmed before calculating a custom fitment.
| Configuration | Position | Wheel | Offset | Tire |
|---|---|---|---|---|
| Air Suspension | Front | 21×9.5J | ET39.5 | 265/35R21 |
| Rear | 21×11J | ET43 | 305/30R21 | |
| Coilover | Front | 21×10J | ET42 | 265/35R21 |
| Rear | 21×12J | ET42.5 | 325/30R21 |
Air-suspension package measured by MAKSTTON. Factory coilover package data provided by XIAOMI SU7 Ultra owner Jimmy. Thank you to Jimmy for sharing.
Bolt Pattern and Center Bore
The published center-bore specification and the MAKSTTON recommended custom wheel center bore describe different values. The published figure is the factory center bore; the custom figure is the bore MAKSTTON machines for a direct hub fitment.
| Specification | MAKSTTON Reference |
|---|---|
| Bolt Pattern (PCD) | 5×114.3 |
| Published Center Bore | 64.5mm |
| MAKSTTON Recommended Custom Wheel Center Bore | 64.55mm |
PCD and center-bore data supplied for the XIAOMI SU7 Ultra.
Measured Factory Fender Clearance
Baseline: factory air-suspension 21×9.5J ET39.5 front / 21×11J ET43 rear package at factory suspension height, measured from the fender lip to the outer wheel rim.
| Measurement | Front Left | Front Right | Rear Left | Rear Right |
|---|---|---|---|---|
| Fender lip to wheel rim | ≈9mm | ≈13mm | ≈18mm | ≈16mm |
Use this guide as a baseline, not the final answer. Measurements from your own vehicle are always more valuable. Read our Flush Fitment Guide, measure your car, and calculate the fitment that matches the stance you want.
XIAOMI SU7 Ultra Wheel Bolt and Lug Nut Specifications
| Fastener Item | Specification |
|---|---|
| Fastener Type | Lug nuts |
| Thread Size | M14×1.5 |
| Nut Length | 25mm |
| Seat Type | 60° conical seat |
| Hex Size | 21mm |
Confirm seat type and thread engagement against the final wheel before installation.
Recommended Wheel Load Rating
The XIAOMI SU7 Ultra has a gross vehicle weight rating of 2,810kg, and the factory wheel does not carry a marked load rating. MAKSTTON therefore derives the target from the vehicle's maximum permitted mass using a safety factor of 1.2:
2,810kg ÷ 4 × 1.2 = 843kg
MAKSTTON recommended minimum: ≥ 850kg per wheel.
Load capacity should never be traded for a lower wheel weight or a more aggressive wheel position. Confirm the final value against the exact vehicle version before ordering.
MAKSTTON Custom Fitment Recommendation
Based on the factory suspension height.
5mm Wheel-Rim Inset from the Fender
| Position | Wheel Size | Offset | Tire |
|---|---|---|---|
| Front | 21×9.5J | ET36 | 265/35R21 |
| Rear | 21×11J | ET32 | 305/30R21 |
Fender clearance may vary slightly between vehicles due to production tolerances. Use these figures as a reference only.
Recommended MAKSTTON Wheel Designs
These eight made-to-order forged wheel designs can be custom-manufactured for the XIAOMI SU7 Ultra. Wheel diameter, width, offset, bolt pattern, center bore, load rating and finish are specified for the vehicle and order.
FG MR7
View Wheel Details →
FG MR8
View Wheel Details →
FG MR5
View Wheel Details →
FG MR6
View Wheel Details →
FG BO05
View Wheel Details →
FG RE03
View Wheel Details →
FG RE07
View Wheel Details →
FG ZO ST5
View Wheel Details →Factory-Size Fitment Cases
Case 02: FG FK07R
| Item | Front | Rear |
|---|---|---|
| Wheel Model | MAKSTTON FG FK07R | |
| Wheel | 21×9.5J ET23 | 21×11J ET23 |
| Tire | 265/35R21 | 305/30R21 |
Case 03: FG MR5
| Item | Front | Rear |
|---|---|---|
| Wheel Model | MAKSTTON FG MR5 | |
| Wheel | 21×9.5J ET23 | 21×11J ET23 |
| Tire | 265/35R21 | 305/30R21 |
Case 04: FG MR6
| Item | Front | Rear |
|---|---|---|
| Wheel Model | MAKSTTON FG MR6 | |
| Wheel | 21×9.5J ET23 | 21×11J ET23 |
| Tire | 265/35R21 | 305/30R21 |
Track Fitment Cases
These track-oriented cases use wider wheels and tires than the factory package. They are documented as aggressive, non-factory fitments: confirm brake, suspension, alignment and dynamic clearance on the actual vehicle before ordering.
Case 01: FG FK07R
| Item | Front | Rear |
|---|---|---|
| Wheel Model | MAKSTTON FG FK07R | |
| Wheel | 21×10J ET42 | 21×12J ET42.5 |
| Tire | 265/35R21 | 325/30R21 |
Case 05: FG RE07
| Item | Front | Rear |
|---|---|---|
| Wheel Model | MAKSTTON FG RE07 | |
| Wheel | 21×10J ET35 | 21×12.5J ET36 |
| Tire | 265/35R21 | 335/30R21 |
Raymond.cao | Owner-installed data: The setups below were used by the vehicle owner.
| Setup | Front | Rear |
|---|---|---|
| Coilover | 21×11J ET45 | 305/30R21 | 21×12J ET38 | 325/30R21 |
| Track Day | 21×10.5J ET35 | 265/35R21 | 21×12.5J ET36 | 325/30R21 or 335/30R21 |
| Time Attack | 18×10.5J ET26 | 305/660-18 | 18×12.5J ET46 | 325/705-18 |
Track Day rear option: If using the 335/30R21 rear tire, 21×13J ET42 can be used.
Time Attack: This full-slick setup requires front and rear brake changes, including calipers and rotors.
335 Rear Tire Clearance Note
A 335-section rear tire is not a direct fitment for a standard XIAOMI SU7 Ultra. On a car with air suspension at its lowest ride height, the tire can contact the inner liner.
The 335 rear-tire case shown in this guide is equipped with the factory track package, factory coilovers and the factory small widebody. These factory components provide additional clearance and allow the wheel to sit further outward than on a standard SU7 Ultra.
MAKSTTON Vehicle Measurement Record
This original MAKSTTON workshop data-collection sheet is included as measurement evidence for the XIAOMI SU7 Ultra.
Original vehicle measurement record completed by MAKSTTON
XIAOMI SU7 Ultra Wheel Fitment FAQ
What wheels and tires come on the XIAOMI SU7 Ultra?
The factory package depends on suspension. Air suspension uses 21×9.5J ET39.5 front and 21×11J ET43 rear wheels with 265/35R21 and 305/30R21 tires. Coilover cars use 21×10J ET42 front and 21×12J ET42.5 rear wheels with 265/35R21 and 325/30R21 tires.
What is the measured fender clearance on the XIAOMI SU7 Ultra?
The recorded fender-to-rim distances are 9mm and 13mm at the front and 18mm and 16mm at the rear.
What lug nuts does the XIAOMI SU7 Ultra use?
The supplied fastener data is M14×1.5, 60° conical seat, 25mm long with a 21mm hex.
What wheel load rating does the XIAOMI SU7 Ultra need?
The factory wheel does not carry a marked load rating. With the 2,810kg GVWR and MAKSTTON’s 1.2 safety factor across four wheels, the minimum recommended rating is ≥ 850kg per wheel.
What custom wheel fitment does MAKSTTON recommend?
See the final recommendation table for the current wheel-rim inset options, offsets and matching tire sizes.
Binghua Yang | Product Development Manager
Technical data: | Technical Department
If you have any questions, find an error in this guide or have additional verified fitment data, please contact MAKSTTON at info@makstton.com.
Fitment Notice: The data in this guide is based on vehicles measured by MAKSTTON and documented installations and is provided for reference only. Vehicle tolerances and changes in wheel width, tires, brakes, suspension, ride height or alignment may affect fitment. Confirm the final specifications, load rating, wheel-fastener engagement and dynamic clearance on the actual vehicle before production and use.