Sumo Spring Warning

[Dave D]

last summer I installed the blue sumo springs. They were great until the cold hit.
I noticed on speed bumps it felt like it was bottoming out and I was going slow. Went over these at the wallmart a hundred times.
They go rock hard in the cold.
After some investigation they only recommend using to 14 deg F (-10c).
Luckly I only put them in the rear so it only took a few minutes to put the old bump stops back.

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[Hemy5587]

Same for Timbrens, which is what I use. They are rubber vs the Sumo Springs polyurethane but they are stated to be good to -25 F however they definitely stiffen up before they get to -25 F just the nature of the beast. Everything gets a little stiffer in the winter, myself included.