The size of Center Bore is required to be 67.1mm (to hub and to wheel)

The wheel spacer adapter is attached to the axle contact surface using the fastening screws supplied. The wheels are attached with the existing wheel bolts of the standard and special wheels.

Please Make Sure You Take The Proper Measurements Before Purchasing:
Center Bore(CB): 67.1 mm (Car) to 67.1 mm (Wheel)
Center Bore height: should be less than 22mm, if the lip on the axle is more than 22mm height the installation will fail.
Thread: M12x1.5

Information on the wheel spacer adapter:
Material: Forged 6061-T6 Aluminium, aircraft grade aluminium, more lighter and strength
Thickness: 25 mm
Widening per axle: 50 mm (25 mm per wheel side)
Bolt circle on hub side: 5x114.3
Bolt circle on rim side: 5x114.3
Wheel Bolts: Grade 12.9 Material bolts, stronger than OEM 8.8 Grade
Warranty: 1 YEAR

Fitment:
For Mazda 626(GE GF GW)  1992-2002
For Mazda 929(HC HD)  1986-1995
For Mazda Atenza(GG GH GJ)  2002-2019
For Mazda Axela(BK BL BM)  2003-2019
For Mazda Biante(CC)  2008-2018
For Mazda Bongo Friendee(SG)  1995-2006
For Mazda Bongo Truck(S400)  2020-2023
For Mazda Bongo Van(S400)  2020-2023
For Mazda CX-3(DK)  2015-2023
For Mazda CX-30(DM)  2019-2024
For Mazda CX-30 EV  2021-2023
For Mazda CX-4  2017-2023
For Mazda CX-5(KE KF)  2011-2024
For Mazda CX-50  2022-2024
For Mazda CX-60(KH)  2022-2024
For Mazda CX-7(ER)  2006-2012
For Mazda CX-8(KG)  2017-2023
For Mazda CX-9(TB TC)  2006-2024
For Mazda CX-90  2023-2024
For Mazda Capella(GD)  1989-1992
For Mazda Capella(CG GF)  1994-2001
For Mazda Clef(GE)  1992-1994
For Mazda Cronos(GE)  1991-1995
For Mazda Efini MPV(LV)  1990-1999
For Mazda Efini MS-6(GE)  1991-1994
For Mazda Efini MS-8(MB)  1992-1998
For Mazda Efini MS-9(HD)  1991-1994
For Mazda Efini RX-7(FD)  1991-1997
For Mazda Eunos 300(MA)  1989-1992
For Mazda Eunos 500(CA)  1991-1996
For Mazda Eunos Cosmo(JC)  1990-1996
For Mazda Eunos Presso(EC)  1991-1998
For Mazda Luce(HC)  1986-1991
For Mazda MPV(LV LW LY)  1990-2016
For Mazda MX-30(DR)  2020-2023
For Mazda MX-5(NC)  2006-2015
For Mazda MX-5 Miata(NC)  2006-2015
For Mazda MX-6(GE)  1992-1998
For Mazda Mazda3(BK BL BM BN BP)  2003-2024
For Mazda Mazda3 MPS(BK BL)  2006-2013
For Mazda Mazda5(CR CW)  2005-2015
For Mazda Mazda6(GG GY GH GJ GL)  2002-2023
For Mazda Mazda6 MPS(GG)  2005-2008
For Mazda Mazda8(LY)  2006-2016
For Mazda MazdaSpeed 3(BK BL)  2006-2013
For Mazda MazdaSpeed 6(GG)  2005-2007
For Mazda MazdaSpeed Axela(BK BL)  2006-2013
For Mazda Millenia(TA)  1996-2003
For Mazda Premacy(CP CR CW)  1999-2018
For Mazda Protege5(BJ)  2001-2004
For Mazda RX-7(FD)  1992-2003
For Mazda RX-8(SE)  2003-2012
For Mazda Roadster(NC)  2005-2015
For Mazda Savanna RX-7(FD)  1991-1997
For Mazda Sentia(HD HE)  1991-2000
For Mazda Tribute 2000-2011

Hub Centric Design: with Lip fit tightly to the hub & wheel to reduce any type of vibration or false reading.
Machine-Forged precisely from 6061-T6 aircraft-grade aluminium billet, with heat-treated and hardened 12.9 grade bolts pre-installed. The anodized surface provides additional resistance to corrosion. Extraordinarily strong and light compared to spacers made of steel.

We recommend customers start threading the hardware on by hand so as to not cross thread or strip the threads. Once secured hand tight, use the torque wrench set to the proper torque. Tighten the wheel bolts/lug nuts one after the other in a criss-cross pattern(as show in the sixth photo). Make Sure You Get 5-7 Turns Before Tightening. Suggested To Be Torqued Down By Hand At 85 FT/LBS.
Under- or over-tightening wheel-attaching hardware can be damaging and dangerous. When the lug nuts are over-torqued, this could cause stress fractures and increasing the risks of the lugs breaking under normal conditions.
If no problems (noise, vibration, anything out of the ordinary), Re-torque all lug nuts after 5-25 miles of driving.

Situation and solution of installation Failed:
If your Center bore height is more than the spacer, it means you will either have to go with spacer without hub centric lip OR use thicker spacer. As our hub centric spacer need to have taper to allow the change of center bore size. if you don't check your Center bore height. Inner taper will be in the way. On these spacers if your Center bore height is more than 22mm the installation will fail.

If you are looking to change the PCD of the car to different PCD you will have to make sure the clearance at the back of the wheel allows you to commit this changes. Sometimes if there is a rebate or recess on the back of the wheel, does not mean there is enough clearance, usually if the stud pattern is changed dramatically (eg. 5x100 to 5x120) then there might be an issue.

If your car uses lug nuts (stud extrude from hub to tighten wheel down), you will need to know that if your studs is protruding out by 28mm and you are buying 15mm spacer, you will have 13mm extrusion from the surface of the spacer which might stop the wheels from sitting flat against the spacer. Thus if you get 30mm spacer, you definitely don't have to grind anything for sure.