Shock Absorber Type 643 Competition QS

Marsoni

M251S

$712.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Shock Absorber Type 643 Competition QSSwiveling, diagonally mounted compression reservoir. The reservoir is mounted at an angle and can swivel, offering numerous installation options on space constrained bikes. A solid milled upper mount integrates the high and low speed compression adjusters. Both compression and rebound provide 22 clicks of adjustment for uncompromised fine tuning. A pressure control valve prevents hydraulic blocking and tames sudden impacts. Spring preload is

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We offer a 30-day return/exchange service after receiving.
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Perfect solution for our umbrella stands! It is slightly taller than original pipe on stand (this is a plus!) Has two bolts instead of one (Another plus) to help secure the umbrella better. Has two rubber reducers to fill in gap around the umbrella pole. Only issue is the shank on the bolt is too long (bolt that secures pipe to base). Extra bolt was too short. We are purchasing another one for another umbrella stand. Great price for the product! And was easy to install, keeps the umbrella straight and upright!

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Reviewed in the United States on September 10, 2025

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Dallas, US

★★★★★ 5

Good quality, but likely holds water.

Good quality and was easy to install on base with two bolt lengths provided. I modifed by drilling a small hole through the base of the pole mount so that water can drain out. I have previously ended up with a rotten wooden umbrella pole because the pole mount held water!

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Reviewed in the United States on March 30, 2026

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Don B.

Belleville, US

★★★★★ 5

This is the one to buy

It was the perfect replacement heavy duty constructed and able to take different size umbrellas.

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Reviewed in the United States on August 24, 2025

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Robi

Dallas, US

★★★★★ 4

Good fit, but loosens easily

Fit perfect but the wind blowing makes the whole umbrella move the part enough to loosen it so continually having to tighten, which is a pain since you have to do so from the bottom of the base.

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Reviewed in the United States on April 29, 2025

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Carnegie, US

★★★★★ 5

works for me!

Seems much higher quality than the original, install is simple, and I like that there are 2 screws for hold the umbrella tight and straight

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Reviewed in the United States on October 7, 2025