GPM Racing Aluminium Rear Lower Arms for Losi 1/10 Lasernut Tenacity Ultra 4 (LU4056)
We are the importer of record — the price you see is the price you pay.
Handled by us in the UK under the Consumer Rights Act — no sending it overseas.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
Key Specs
- Scale
- 1/10
- Weight
- 98 g
About this product
Precision rear arm upgrade for TEAM LOSI LASERNUT U4 by GPM LU4056
The GPM Aluminium Rear Lower Arms provide a stiff, low-deflection rear mounting point for the TEAM LOSI LASERNUT TENACITY U4. These parts enhance chassis support and stabilise the rear knuckle under dynamic loads to improve consistency lap to lap.
Technical features
- Fabricated from Aluminium 6061 T6 for a high strength to weight ratio.
- Delrin collars fitted to reduce pivot friction and improve bearing life at the pivot points.
- Hollow section design reduces unsprung mass while maintaining bending stiffness.
- Multiple damper mounting holes permit incremental changes to shock angle and roll characteristics.
Adjustment and function
Designed for tunability, the arm allows dampers to be mounted in alternate positions to change leverage and damping response. This supports setup changes for varied surfaces and driver preference.
Specifications
- Material: Aluminium 6061 T6
- Part Location: Rear lower arm area
- Compatibility: TEAM LOSI LASERNUT TENACITY U4
Packing includes
- Rear Lower Arm – 2pcs
- Stainless Steel Round Head Screw 3×14 – 2pcs
- Stainless Steel Round Head Screw 3×16 – 2pcs
- Set Screw 5×8 – 2pcs
Original Name / Part No:
LOS234017
Compatible Models
- TEAM LOSI LASERNUT TENACITY U4
What material and machining standards are used?
Components are produced from 6061 T6 aluminium with precise machining to control tolerances and ensure consistent fitment.
How does the Delrin collar improve longevity?
Delrin reduces metal on metal contact at pivots, lowering wear and maintaining smooth articulation over many cycles.
Recommended setup checks after fitting?
Verify pivot screw torque, confirm damper alignment through the travel, and run basic alignment checks to ensure intended geometry. Write Product Review Please sign in your account before you can write any review.
Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
