|Gumby greeting the world he meets in the streets with his "Hi there! Have a great day" pose.|
I was feeling some peer pressure to mount a whimsical figure on my handlebars to send a message to the world, but which figure? And more importantly, which mount? I chose Gumby, and 3M Dual Lock, and tested the combination under a variety of temperatures, wind speeds, road roughness, and humidity. I cleaned the surface with alcohol before applying the adhesive, and allowed the recommended 72 hours of cure time before squishing the two pieces together on the bar.
For this application, I chose the SJ3550(Type 250) Dual Lock, with approximately 250 stems per square inch, with a rated tensile disengagement strength of 57 pounds per square inch, and with peal and cleavage mode separation strengths considerably lower. Assuming that Gumby is a flexible substrate, and the handlebar a rigid substrate, that combination has a 90 degree peal strength rated at 4.6 pounds per inch of width. He's easier to peal off sideways than frontways or backways. I determined that the most reliable way to evaluate the suitability of the combination was to gather empirical data under real-world conditions.
The results? I conclude the 3M Dual Lock is an adequate mounting system for Gumby on a handlebar under typical Phoenix summer commuting conditions. I will report back periodically on any issues noted over time. Get up. Go ride.
|He gestures serenely at the pigeons in the distance along the canal, bearing ill will toward no creature.|