| Basics of Mini 4WD | ||||
| Part of the chassis | ||||
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| Basics of Grade-up Parts | ||||
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| Intermediate and expert customizations | ||||
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| Race categories | ||||
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The rear stay (Japanese: リヤステー, Riyasutē) is the rear part of the Mini 4WD car's chassis.
How the rear stay work[]
In eariler days of MIni 4WD racing, the rear wheels is always touching the fences during cornering, thus slowing down the car. The rear stay's function is to keep the rear wheels from touching the fences. In addition, being installed with the rollers, the rear stay is also provide smoother cornering.
In most Mini 4WD car's setups, the rear stay is usually installed with two pairs of rollers (One on the upper sides and one on the lower sides.). This is because having two pairs of rollers on the rear stay will provide better stability, especially during wave sections and lane-change sections.
Newer chassis like Super-II Chassis, AR Chassis, MA Chassis and FM-A Chassis had their rear stay extended.
Breakage and reinforcing the rear stay[]
As the car was tunes faster, the rear stay might not able to withstands the impacts and will eventually breaks apart. This is where the reinforced plates and shock absorb parts comes to play; those parts are used to strengthen the rear stay, extend it and in some parts, absorbs the impacts. Extending the rear stay will also lessen the impacts it receives, which in turns increases the car's acceleration and stability.
Advance-user setups[]
Racer will usually have to remove and/or cut off the rear stay for the bumperless setups.
Rear stay compatibility[]
Compatibility between chassis and the rear stay vary depending on the hardpoint standard(s) the chassis and the rear stay used.
Chassis like Zero Chassis, Super-1 Chassis, Super-FM Chassis and Super TZ Chassis are only compatible with the rear stay that are using the single hardpoint standard (in which they slotted into a single slot at the rear bottom of the chassis and fixed by screw.), while chassis like TR-1 Chassis, MS Chassis (with the T-03 unit), FM-A Chassis and VZ Chassis are only compatible with the rear stay that are compatible with the dual hardpoint standard. Super X Chassis, VS Chassis, Super TZ-X Chassis, Super XX Chassis and Super-II Chassis are the only chassis that support rear stays with either hardpoint standards.
Truckin' Chassis has its on rear stay attachment mechanism that is not compatible with any of the GUP rear stays.
Some chassis, notably MS Chassis (with either T-01 and T-04 tail units equipped), AR Chassis, MA Chassis, have the rear stay being part of the main chassis frame and is not removable. Those chassis have attachment holes that matched that of the dual hardpoint standard, allowing the frp/carbon rear stay using the standard to attach onto the chassis.
Where to get the rear stay[]
The rear stay is usually optional (Either Grade-up Parts or kit-included) on most Mini 4WD chassis.
The chassis that come included with a rear stay (in most kits) are as follows:
- Truckin' Chassis (clipped on)
- Super-FM Chassis (One Point Attachment)
- Super TZ Chassis (One Point Attachment)
- Super X Chassis (Three Point Attachment)
- VS Chassis (Three Point Attachment)
- Super TZ-X Chassis (Three Point Attachment)
- TR-1 Chassis (Two Point Attachment)
- Super XX Chassis (Three Point Attachment)
- Super-II Chassis (Three Point Attachment)
- FM-A Chassis (Two Point Attachment)
- VZ Chassis (Two Point Attachment)