TR6 speedo gear reduction

[Fredshealey]

anybody out there know of a speedo gear adapter,that would increase the speedo cable turns by about 50 percent-my speedo is slow,meaning it shows 40 mph instead of 60mph
any info would be greatly appreciated
Fred

 

[Gliderman8]

I have a ratio adapter on my TR6. I needed it after installing my 5-speed Supra transmission. You can get them at most speedometer shops or on-line. I think I paid around $100 a few years ago.
They look like this:

 

[Fredshealey]

where exactly can I buy one for 50 percent faster speed?

 

[Gliderman8]

Here's a place I just found on the net:https://speedometercablesusa.com/gear_box_adapters.html
I would wait to see where others on this forum have bought theirs before contacting any supplier without references.
Again, the link I supplied was found from a quick search on the net.....Caveat emptor.