Can the OneUp 210mm dropper be slammed on a M 2026 bullit fram?

Can the OneUp 210mm dropper post be slammed on a medium 2026 bullit frame? Thanks

HappyCamperIan said:

Can the OneUp 210mm dropper post be slammed on a medium 2026 bullit frame?

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Short answer: yes, @HappyCamperIan - it fits. @ebsocalmtb confirmed the OneUp 210mm V3 can be slammed into a 2026 Bullit medium, and there's an owner report from a rider at 5'7" running exactly that setup with full insertion. Given you're in a similar height bracket based on your profile, you should be fine.

The OneUp V3 210mm has 300mm of insertion length, so there's plenty to work with. The Bullit's seat tube geometry on the medium is generous enough that slamming it isn't an issue.

One thing worth flagging: your database spec shows the 2026 Bullit medium running a Bosch CX Gen 4 with a 600Wh battery. That's the older motor and battery spec - worth bearing in mind if you're comparing it against current builds running Gen 5 and 800Wh.

The dropper itself will go straight in. No drama.

EDIT: @TheBob reports The user is correcting this by suggesting the answer is not straightforward - they doubt it will work and direct to Santa Cruz's official dropper post compatibility tool, implying the actual answer re. Not yet independently verified — take with a pinch of salt.

Thanks Greg. Has anyone tried slamming a 240mm version on the same bike?

HappyCamperIan said:

Thanks Greg. Has anyone tried slamming a 240mm version on the same bike?

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No community reports on the 240mm specifically on the 2026 Bullit medium, @HappyCamperIan. The 210mm V3 has 300mm insertion, which is why it slams comfortably. The 240mm V3 has 380mm insertion, so the question is whether the Bullit medium's effective seat tube length accommodates that extra 80mm of post below the clamp.

I'd want to verify the actual seat tube length before telling you it's a straight yes. If you can measure from the BB to the top of the seat tube on your frame, that's the number that matters. The minimum insertion mark on the OneUp 240mm is your limiting factor - if your seat tube can take it, it slots in fine. If not, you'll hit the minimum insertion line before you can close the clamp at your preferred saddle height.

Worth dropping OneUp a message as well - their support is genuinely good and they'll tell you straight whether the 240mm works for a given seat tube length.

Plug your measurements in and see, but I doubt it

TheBob said:

Plug your measurements in and see, but I doubt it Dropper Post Calculator

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Good shout, @TheBob. Santa Cruz's dropper calculator is exactly the right tool for this, and it handles the Bullit specifically which removes a lot of guesswork.

The key output to look for is the maximum insertion depth the frame can take versus the minimum insertion required by the 240mm post. If those numbers don't add up with room to spare at your preferred saddle height, you're done before you start.

The OneUp shimming option the page mentions is also worth knowing about if the 240mm is borderline. Though at that point you might ask yourself why you bought a 240mm to shim it down.

TheBob said:

Plug your measurements in and see, but I doubt it

Dropper Post Calculator

This tool is to help you determine the maximum and minimum dropper post length you can fit in your frame given your saddle height. Check it out!

www.santacruzbicycles.com

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Thanks Bob, 210 it is then

Installed.