Seat clamp size?

sc00ter · October 03, 2020, 04:33:23 PM

So my RadRunner has a common 27.2mm seat post, but a normal 28.6 seat clamp does not fit. Here's my intention. I wanna put a bmx non-quick release seat clamp on my RadRunner and install a Hexlox so my comfy seat won't get kidnapped, but I found that a 28-6mm seat clamp won't fit the frame. I measured 31.2ishmm with my cheap-o digital gauge, but I just want to confirm the correct size before ordering a seat clamp. I emailed Rad support with my question also, but if anyone has a confirmed size please let me know, and if I figure it out I'll post my findings. Thanks.

Jman · October 03, 2020, 05:09:22 PM

I got the 32mm size from https://www.saveyourseatlock.com/product/quick-release-seat-lock/ and it fits correctly.

sc00ter · October 03, 2020, 05:41:06 PM

I found a 30mm from my old Taj Fairdale 26" bmx bike and it didn't fit. Thinking of trying a 31.8mm bmx clamp but then Jman found the coolest seat clamp (32mm recommended by him) EVER! What made you find that Save Your Seat clamp anyway? I might try that instead! Thanks again.

Jman · October 03, 2020, 10:15:27 PM

I found it on youtube. It also doubles as a lock for the battery too if you position it so that it blocks it from being lifted out of the cradle.

sc00ter · October 04, 2020, 07:17:53 AM

I ordered the Save Your Seat in 32mm and will post my results. Still might also order a bmx clamp in 31.8mm just in case. At the end of the year I round up all my old bike stuff that's no longer being used and donate it to a bicycle rehab.

massassi · October 04, 2020, 01:05:34 PM

Those are super Rad Jman. I want one too!

sc00ter · October 04, 2020, 04:43:06 PM

Rad Power responded to my question and confirmed seat clamp size at 31.8mm. So I know the confirmed 32mm that Jman listed works as well.

RadInSD · July 13, 2021, 04:48:34 PM

I just bought this for my Rad Runner Plus. It won't work as the key cannot be removed because it's blocked by the frame. Am I crazy?

Jman · July 13, 2021, 09:15:35 PM

Rotate it a bit so the key can be inserted and removed easily.

Keithp7 · June 14, 2022, 01:38:57 PM

I just called Rad and they said 31.8 is the clamp size.

Jack Ducan · December 18, 2022, 11:25:10 PM

Due to variations in size and diameter, tightening bike seat clamps do not require a definite torque. There is a maximum torque mark indicated in the seat clamp area that you can follow when calibrating one, its minimum insertion depth is 150mm to securely hold it in place.

Jack Ducan · December 21, 2022, 08:16:25 PM

The foremost thing that you should consider when installing a bike seat clamp is its tightness, which is crucial to ensure the rider?s safety. Moreover, to avoid mishaps related to slipping seat posts. Due to variations in size and diameter, tightening bike seat clamps do not require a definite torque. There is a maximum torque mark indicated in the seat clamp area that you can follow when calibrating one.

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Seat clamp size?