Brass F10 Rear Portal Cover Weight vs Aluminum: Which to Run
By Vanquish Products - Premium RC Crawler Kits & Accessories | Published: 2026-11-03
Category: المقارنات
Compare the Brass F10 Rear Portal Cover Weight with stock aluminum covers on fitment, mass placement, and tuning goals so you can decide which rear portal setup suits your crawler.
Quick answer
Run the Brass F10 Rear Portal Cover Weight when you want to add mass below the axle centerline to lower your crawler's center of gravity; keep the aluminum covers when you prioritize minimum unsprung weight or run a lighter build where added rear mass works against you.
Where the weight actually sits
The key difference is not just material—it is placement. The brass covers are designed to add weight below the centerline of the axle, which is why they can change how the rear end settles and resists tipping on off-camber lines. Aluminum covers are the lighter baseline, so they leave the rear portal assembly closer to its original mass.
The trade-off you accept with brass
Adding over 129g for the pair is meaningful mass on a crawler, and it is mass you cannot switch off mid-run. That helps when you want a more planted rear end, but it also means the rear axle carries more weight in every situation, including climbs where you might prefer a lighter rear. Aluminum covers avoid that penalty but give up the low-mounted ballast.
Fitment is the same, so the decision is tuning
Both paths use the same F10 rear portal housing interface: the brass covers are a direct replacement for the F10 Portal rear covers and are compatible with the plastic VPS08605 or the machined aluminum VPS8617 and VPS8618 rear portal housings. Because fitment does not force the choice, pick based on the handling trait you want rather than on compatibility.
Decision rules and trade-offs
- Choose brass when: You want to lower your crawler's center of gravity with mass placed below the axle centerline and accept the extra 129g-plus pair weight as permanent ballast. Confirm your rear portal housing is VPS08605, VPS8617, or VPS8618 before ordering.
- Choose aluminum when: You want to keep the rear portal assembly light and avoid adding permanent low-mounted mass, accepting that you give up the COG-lowering effect of the brass covers. Aluminum is the baseline, not an upgrade path—decide whether you actually need rear ballast.
- Mix front and rear thoughtfully: Because the brass covers add weight only at the rear, consider how that changes front-to-rear balance before adding more brass elsewhere; this article covers only the rear portal cover comparison. Re-check balance after the swap rather than assuming more brass is always better.
Product facts
- Brass F10 Rear Portal Cover Weight: Direct replacement for F10 Portal rear covers, compatible with plastic VPS08605 and machined aluminum VPS8617 and VPS8618 rear portal housings. You can swap covers on an existing F10 rear portal without changing housings.
Brass F10 Rear Portal Cover Weight - Brass F10 Rear Portal Cover Weight: The pair weighs over 129g and is built to add weight below the axle centerline to lower your center of gravity. That low placement is the tuning lever; the mass is intentional ballast, not a side effect.
Who should run which
Best for
- Crawler builds that need a lower center of gravity and a more planted rear end
- Owners of F10 rear portals with VPS08605, VPS8617, or VPS8618 housings who want a direct cover swap
Not for
- Builds where minimizing rear unsprung mass matters more than low ballast
- Crawlers already carrying enough rear weight where extra mass would upset balance
