Parametric Seat Tube Shim 25.4 Pivotal to 30.9 mtb (25.34mm OD to 30.83mm ID) x 100mm Long
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution — Noncommercial — Share Alike
Adapt a pivotal 25.4mm post (common BMX size) to 30.9 seat tube ID. Recommend PETG-CF or PET-CF. Tried EasyPA but it's slippery... Shim head has a relief to prevent cracking/layer separation. Can be printed vertically with no issue, as the forces clamping it are in XY anyway.
It 100% works - perfect fit for my son's mountain bike. However the PA material required additional torque on the seatpost clamp to stop it from slipping. I used the shim to adapt a Spawn Brood Yama Jama Pivotal seatpost to a Rocky Mountain Reaper Mtb, for a lower seat height.
For Parametric model of this seat tube adapter, please see my "other" site:
https://makerworld.com/en/models/2404415-parametric-seat-tube-shim-mtb-or-any-bike
Printing
For Easy PA: 270C Nozz, 50C bed, iron top surfaces, 100% infill 0.6 nozzle with 0.18-0.30 layer height (your choice)
Personally, printing again, I'd go with a CF filament and possibly fuzzy skin for extra friction/grip when clamping down the post. I'd also add friction paste like finish line fiber grip.
NOTES
If you like my work, and have seen the Elegoo Centauri Carbon, consider checking it out with my affiliate link below. I purchased one with my own money, but I appreciate the support so I can keep making/reverse engineering cool models.
Purchasing
If you don't have a 3D printer and would like to purchase this item, I would be happy to print and ship it to you. Send me a message at [email protected]. Located in USA but will ship globally if required. Shipping will vary and affect cost.