Makstton Vehicle Fitment Guide

DENZA B8 (FANGCHENGBAO BAO 8) Wheel Fitment Guide

By Binghua Yang · September 2026

Based on measurements recorded from a documented vehicle, this guide covers wheel and tire fitment for the BYD DENZA B8, sold in China as the FANGCHENGBAO BAO 8: the 6×139.7 PCD, the 64.1mm published center bore (MAKSTTON machines its custom wheels to 64.05mm), the factory 21×8.5J ET40 wheel with 275/50R21 tires, the measured fender clearance and the recommended 20- and 21-inch fitments.

As a heavy new-energy off-road SUV, the B8 needs replacement wheels that prioritise load capacity and structural strength ahead of appearance. Its gross vehicle weight rating is 3,905kg, and the factory wheel carries a 1,325kg per wheel load rating.

The specifications in this guide were recorded from one documented vehicle, and factory data may vary slightly between versions. Confirm load rating, brake clearance and spare-wheel carrier clearance on the actual vehicle before ordering.

View Recommended Fitment
DENZA B8 (FANGCHENGBAO BAO 8) fitted with Makstton N40° FG M11 forged wheels, side-profile installation view

DENZA B8 Fitment at a Glance

Fitment Item MAKSTTON Reference
Bolt Pattern (PCD) 6×139.7
Published Center Bore 64.1mm
MAKSTTON Recommended Custom Wheel Center Bore 64.05mm
Factory Wheel 21×8.5J ET40
Factory Tire 275/50R21
Factory Wheel Fasteners M14×1.5 lug nuts
Gross Vehicle Weight Rating 3,905kg
Factory Wheel Load Rating 1,325kg per wheel

Factory Wheel and Tire Specifications

MAKSTTON recorded one factory wheel-and-tire configuration on the measured vehicle. The front and rear use the same wheel and tire size.

Factory Setup Position Wheel Tire
Standard 21-inch Front 21×8.5J ET40 275/50R21
Rear 21×8.5J ET40 275/50R21

These values were recorded from the documented vehicle. Factory specifications may vary slightly between versions.

The DENZA B8 is a high-load vehicle. Replacement wheels should have a load rating of at least 1,325kg per wheel, matching the factory wheel rating. For off-road use, frequent full-load driving or long-distance travel, Makstton recommends increasing the rating to 1,400kg per wheel.

Bolt Pattern and Center Bore

Specification MAKSTTON Reference
Bolt Pattern (PCD) 6×139.7
Published Center Bore 64.1mm
MAKSTTON Recommended Custom Wheel Center Bore 64.05mm

The published figure is the center bore quoted for the factory wheel. For a Makstton custom wheel on this application, MAKSTTON specifies a center bore of 64.05mm so the wheel locates directly on the hub.

DENZA B8 Wheel Bolt and Lug Nut Specifications

Fastener Item Specification
Fastener Type Lug nuts
Thread Size M14×1.5
Nut Length 18.5mm
Hex Size 21mm
Seat Type 60° conical seat

Confirm the fastener seat type, thread engagement and tightening torque on the actual vehicle before the final installation.

Measured Factory Fender Clearance

Baseline: factory 21×8.5J ET40 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 ≈40mm ≈39mm ≈38mm ≈39mm

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.

MAKSTTON Custom Fitment Recommendation

Based on the factory suspension height.

Option Wheel
21-Inch 21×8.5J ET0
20-Inch 20×8.5J ET0
21-Inch Wide 21×9J ET0
20-Inch Wide 20×9J ET0

With AT tires and the factory bodywork and fenders retained, these fitments are expected to protrude approximately 10–15mm beyond the body. Actual results depend on the tire model and its measured section width.

Spare-wheel carrier warning: These recommendations change the factory offset, and the 9J options also increase wheel width. The factory rear-mounted spare-wheel carrier is therefore unlikely to accept the same setup without modification. If the external spare must be retained, verify the carrier clearance separately or keep the factory wheel specification for the spare.

Fender clearance may vary slightly between vehicles due to production tolerances. Use these figures as a reference only.

Recommended Makstton Wheel Designs

These N40° custom forged (FG) off-road wheels can be produced in the recommended 20- and 21-inch BYD DENZA B8 specifications with the correct load rating, PCD and center bore for this vehicle.

Real-World Fitment 01: DENZA B8

DENZA B8 (FANGCHENGBAO BAO 8) real-world fitment on 20-inch Makstton N40° FG M11 forged wheels, rear view with the rear-mounted spare wheel
View More Fitment Photos & Installation Details
Item Front Rear
Model MAKSTTON N40° FG M11
Wheel 20×8.5J ET40 20×8.5J ET40
Tire 275/55R20 AT 275/55R20 AT
Wheel Load Rating 1,400kg per wheel

The 20×8.5J ET40 case keeps the factory 21×8.5J ET40 width and offset, so the outer wheel rim stays at the same position as the factory rim (0mm) — only the diameter and tire size change.

Makstton Vehicle Measurement Record

This original MAKSTTON workshop data-collection sheet from the measured BYD DENZA B8 (FANGCHENGBAO BAO 8) is included for reference. For mainstream vehicles, MAKSTTON may review and summarize measurements from multiple vehicle records rather than rely on a single sheet.

MAKSTTON DENZA B8 (FANGCHENGBAO BAO 8) wheel, hub, bolt and chassis measurement data sheet
Original vehicle measurement record completed by MAKSTTON

DENZA B8 Wheel Fitment FAQ

What is the DENZA B8 bolt pattern and center bore?

The DENZA B8 uses a 6×139.7 bolt pattern. The published center-bore specification is 64.1mm, while MAKSTTON machines its custom wheels to 64.05mm for this application.

What is the factory DENZA B8 wheel and tire size?

The measured DENZA B8 runs 21×8.5J ET40 wheels with 275/50R21 tires, the same size front and rear.

What wheel fitment does MAKSTTON recommend for the DENZA B8?

MAKSTTON recommends a 21×8.5J ET0 or a 20×8.5J ET0 setup, with a 21×9J ET0 or 20×9J ET0 wide option. With AT tires and the factory fenders retained, these fitments sit approximately 10–15mm outside the body. See the final recommendation table for the exact specifications.

What load rating does a DENZA B8 wheel need?

The DENZA B8 has a gross vehicle weight rating of 3,905kg, and the factory wheel carries a marked load rating of 1,325kg per wheel. A replacement wheel should match that figure as a minimum; for off-road use, frequent full-load driving or long-distance travel, MAKSTTON recommends 1,400kg per wheel.

What lug nuts does the DENZA B8 use?

The DENZA B8 uses M14×1.5 lug nuts with an 18.5mm nut length, a 21mm hex and a 60° conical seat. Confirm the seat type and thread engagement against the new wheel before installation.

Will the factory spare-wheel carrier accept a wider wheel?

Probably not without modification. The recommended offsets change the factory offset, and the 9J options also increase wheel width, so the rear-mounted spare-wheel carrier is unlikely to accept the same setup. If the external spare must be retained, verify the carrier clearance separately or keep the factory wheel specification for the spare.

Binghua Yang, Product Development Manager, MAKSTTON

Binghua Yang | Product Development Manager

Renbing Xiong, Technical Department, MAKSTTON

Technical data: Renbing Xiong | 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.