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Reviews (25)

Dec 13, 2018
Thorn Resistant versus regular tubes
I am unable to address the quality of the rubber and the quality of the manufacturing process of this brand -- except that I gather the brand is perfectly reputable. But I can address TR vs regular tubes, since I work on perhaps 100 bikes a year.
Thorn Resistant tubes are made of much thicker rubber, and that is a huge advantage. Besides resisting punctures better, they lose pressure far slower. (All materials leak -- it is only a matter of degree.) The primary cause of flats is under-inflation.
Also, bikes that sit unused for a while suffer tire damage where the weight of the rim squishes the sidewall against the floor in a sharp fold. TR tubes typically maintain the tire's shape all winter.
One downside: TR tubes suffer torn valve stems more often. I assume this is because of less flexibility. So it is still vital to make certain you have full tire pressure before riding, even for the shortest trips.
To avoid losing air by applying a gauge, which defeats the purpose, I recommend "calibrating" your thumb to check the pressure. That way, you will benefit from the TR tube's slower unavoidable seepage of air.

Jun 12, 2016
Only way to go!
These 4-sided spoke keys are simply the only way to go. They grip all four corners of the nipple, and I have yet to have one slip -- which happens all the time with conventional 2-sided keys. It works similarly to a flare nut wrench, if you have worked on hydraulic lines and such.
The black size I rarely need. The red size is the one I use all the time.

Jun 10, 2020
Seem to be the solution.
Good thing these are available online at a tolerable price, because they are not likely to be found in your local hardware store (and I would not dare ask the price at a MBZ dealer).
I have not had them cut yet (and don't know where yet), but they do look to match my original MBZ key.