Seb from Luna Cycle contacted me to ask if the eyelet dimensions of the OEM FastAce rear shock were different than the Ohlins TTX22 replacement I changed over on my bike. I told him yes and asked why. He mentioned that a customer wants to lower their Sur Ron and Seb knew I had purchased a shorter shock then the OEM FastAce. So he figured I had experience with the measurements.
Here is a side by side comparison of my bike with the OEM 10.5″ FastAce and the 9.5″ Ohlins TTX
If I wanted to lower my bike, let’s say for a shorter person or child, I’d first look at purchasing the SuperMoto 17″ wheelset. If that was not enough I’d then purchase a shock shorter than the OEM 10.5″ model. (I want to say that I’d NEVER go with a longer shock because at 10.5″ the spring BARELY clears the swingarm linkage.) And for those suspension geniuses who think removing the shock linkage and converting it to a direct mount system is better….well OK. To each their own, but having worked with REAL suspension engineers on race bike linkage I know it’s WAY MORE than just removing something. Like progressive spring travel…? Enough said….
To bring my Ohlins 9.5 back to the 10.5 length I had a local metal fabricator make me a shock tower extender. If you want to know why I didn’t just buy a 10.5″ Ohlins TTX you can read about my reasons here.
If you change to a different shock keep in mind that the EYELETS and BUSHING at each end differ not only by brand of shock, but by the model of shock. I was fortunate that the Ohlins I purchased on eBay have the exact interior eyelet diameters of the FastAce bushings. BUT the width of the eyelet ends were more narrow on the Ohlins TTX. It required me to use additional bushings on the bottom eyelet. Since I had the top shock tower extension custom made the fabricator made it to the width of the TTX. Until I had the shock tower extension made I did have to add spacers for the top mount as well.
For information I have measured the eyelet interior and exterior dimensions for other owners:
So if you’re desire is the lower the ride height of your bike, I hope this information is helpful. You also may want to find out if Sur Ron sells the smaller 17″ wheel kickstand….because lowering the bike will make yours stand pretty much straight up with the stock kickstand. At least the one that comes on the 19″ wheel bike….
Lowering the fork tubes in the triple clamps is something else to do. But that’s for a whole different post, not one I plan to do either. Just keep in mind trail and angle will play a big role in changing how your bike handles….