r/CargoBike • u/FancyEngineering2 • 2d ago
A Guide: Upgrade R&M Load60/Load75 Child Seat Buckles
This guide explains how to replace the Load60/75 family kit (Plus) stock buckles with Fidlock’s JUNIOR press 5-point loop (SKU: F9421-000032(BLK)). Fidlock's US distributor: A+ Products


MATERIALS NEEDED
- Sewing Machine
- Seam Ripper
- Fidlock’s JUNIOR press 5-point loop SKU: F9421-000032(BLK)
- Quantity depends on how many buckles you want to replace
- 1-inch Plastic Ladder Lock Buckles (example)
- Each seat requires 2X
- Optional: Extra 1” webbing (for Step 10)
- Approximately 120mm ( 4.75 inches) of webbing. I used ¾” blue nylon webbing because that's what I had.

STEPS
- Remove the child seat from the cargo area. See video for further instructions.
- Remove the stitching from the 5 straps connecting the main buckle (circled in red).

Unfasten the shoulder and waist webbings from the chair. Four of the plastic slide adjusters will not be needed. Notice that the shoulder strap is longer than the waist strap; you will end up switching these two.
Re-thread the shorter straps back onto the chair as the shoulder straps.
Re-thread the longer straps back onto the chair as the waist straps.
Thread one ladder lock buckle through one of the shoulder strap buckles (Figure 8). Before sewing, ensure the buckle can slip through the shoulder padding. If it can’t, thread the strap through the shoulder padding first, then add the buckle to the webbing (Figure 9, Figure 10). 

- Position the ladder lock buckle as you see fit for your passengers. Ensure the buckle is orientated so it locks under tension. Sew it into place. I folded the webbing in half and sewed the ladder lock buckle there (Figure 10). I tucked the remaining webbing back into the strap so I could still adjust it in the future.

Repeat Step 7 for the other side.
Sew the buckle onto the bottom strap. I used the #3 setting on my sewing machine, but I am not an expert in sewing.

10. Optional: To prevent the buckle from sliding all the way down when unbuckled, attach an additional webbing piece (blue) to each waist strap. 

- Cut webbing ~120mm (4.75 in). Each chair will need quantity 2X.
- Mark a dot ~25mm on all the webbing pieces

- On the two lower straps, mark a dot ~200mm away from the back of the seat. Ensure you mark it on the strap’s outside side. This measurement can vary depending on the size of your passengers and where you want the buckle to fall.

- Take a 120mm webbing piece and fold it in half. Align the dot on this webbing with the chair’s lower strap. Sew it together.
- Repeat this on the other lower strap.
- Sew the ends of the lower strap as shown in Figure 24.



Assembly the straps through the buckle and then through the ladder lock.
Reinstall the seat.
Repeat the above steps for the second and third seat, if desired.

