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I have recently purchased an old, second-hand folding (or at least collapsable) bike, a Daewoo shuttle to be precise. In order to use it for commuting, I would like to fit a pannier rack onto it. It has very small wheels (16") and so I was thinking of a seatpost mounted rack, preferably with quick release. Unfortunately, the seatpost diameter is quite large (about 35mm, maybe a touch more) and the one rack I bought (https://www.amazon.co.uk/gp/product/B01DUAMLDA) didn't fit because of the seat post diameter being too large.

I have searched everywhere for a pannier rack that fits large diameter seat posts, but have drawn a blank. Can anybody suggest any pannier rack that would fit or any tips or tricks to make a standard pannier rack fit onto a large diameter seatpost?

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  • You might have to make something - problem comes if you need to put the seatpost down for folding.
    – Criggie ♦
    Apr 26, 2018 at 2:59
  • @Criggie Indeed, that's why I was looking at quick release couplings.
    – am304
    Apr 26, 2018 at 8:35
  • You might be able to convert to a quick-ish release by replacing the bolts with wing bolts of just the right length. This would work on a Topeak beam rack, for example (max ⌀31.8 mm so no good to you).
    – Chris H
    Apr 26, 2018 at 11:53

2 Answers 2

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It's probably 36 mm; that seems reasonably common. Most seatpost racks go up to 31.8 mm

Taking 36 mm as a guess makes searching much easier: it's an upper limit for some models:

It seems easier to find a trunk bag attachment for such a large post. There is such a thing as a Rixen & Kaul KLICKfix Caddy Post and Bar Clamp 2016. That would allow you to mount a handlebar bag on the seatpost, or this Vaude mount is designed for their trunk bags but could be used with other things. None of these are of much help if you want to choose a pannier to suit you.

Traditional style racks do exist, such as this Atran Velo Luggage Carrier Active Seatpost (which seems to have curved sides, but many panniers would still fit, and it's quick release). The search that turned up that last one (and the Vaude) was seat post rack "36mm" -rixen

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  • Thanks, that's really helpful. The Atran rack looks promising. What sort of bags are compatible with the Rixen clamp?
    – am304
    Apr 27, 2018 at 8:10
  • My bar bag is an Altura from about 10 years ago, and uses the same fitting (here's a review but I don't think exactly the same one is made any more). Altura kit is pretty decent and they have a few to fit. As the bag backplate is available as a spare you could even customise something
    – Chris H
    Apr 27, 2018 at 9:03
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I installed on my bicycle Atran Velo Luggage Carrier and this is really a good thing. Definitely recommend.

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  • Thank you. as Chris H mentioned, the sides of the rack are slightly curved. Does it cause any problem? The spacing between the two clips on my pannier is about 103-104mm.
    – am304
    Apr 27, 2018 at 16:12

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