This 18-piece brass outer portal drive housing set is produced for TRX4-style portal hubs and is used to increase wheel-end mass for better traction on rough sections. The housings mount to portal hub assemblies and use the included stainless steel cap head screws for attachment.
Material and role: brass raises unsprung and wheel-end weight compared to stock alloy or plastic housings, a common upgrade to enhance low-speed grip and help a vehicle recover when it digs in. Any wheel weight numbers shown by the maker should be confirmed with your own measurements when tuning a build.
Fit and installation: the housing outer diameter is 43mm and requires a wheel inner bore larger than 43.5mm for correct clearance. Confirm wheel inner diameter and hub clearance prior to installation and check that the supplied screws provide proper thread engagement for your axle stack.
Made by brass to increase the weight of each wheel of 182 grams to stabilize the wjeel,enlarge the angle of crawling ,especially when the car is dig into the low lying area landspace ,grab the ground firmly and smoothly drive back to level.
Ensure wheel inner bore exceeds 43.5mm and verify the supplied 2.5mm screws suit your hub stack; fit and test one side first to assess handling impact before completing installation on both sides.
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