Help please - Steel GT serial numbers

[pilule911]

Good day eveyone,

I would like some help identifiying this GT frame I just bought. The groupset seems to be Shimano Exage 300LX, U Brake in the back, canti lever in the front and Kalin seat post which I am not sure is original or not. From what I can make of it, the serial number on the bottom bracket shell reads TM 8904 8906 but I am not sure, you can look for youself on the pictures. It was respayed by a previous owner thus me not knowing what it is. The paint has chipped and you can see a white/cream color underneath. I believe this frame to be a 1989-1990 GT Timberline but your opinion would be greatly appreciated

 

[senorroboto]

Good day eveyone,

I would like some help identifiying this GT frame I just bought. The groupset seems to be Shimano Exage 300LX, U Brake in the back, canti lever in the front and Kalin seat post which I am not sure is original or not. From what I can make of it, the serial number on the bottom bracket shell reads TM 8904 8906 but I am not sure, you can look for youself on the pictures. It was respayed by a previous owner thus me not knowing what it is. The paint has chipped and you can see a white/cream color underneath. I believe this frame to be a 1989-1990 GT Timberline but your opinion would be greatly appreciated

I think the 89 timberline has the rear brake by the bottom bracket and the 90 has it internally routed? 300LX makes me think 1991 Talera

 

[kingoffootball]

Good day eveyone,

I would like some help identifiying this GT frame I just bought. The groupset seems to be Shimano Exage 300LX, U Brake in the back, canti lever in the front and Kalin seat post which I am not sure is original or not. From what I can make of it, the serial number on the bottom bracket shell reads TM 8904 8906 but I am not sure, you can look for youself on the pictures. It was respayed by a previous owner thus me not knowing what it is. The paint has chipped and you can see a white/cream color underneath. I believe this frame to be a 1989-1990 GT Timberline but your opinion would be greatly appreciated

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Thank you for sharing this, 1989 probably saw the most change, so it is helpful to have more numbers from that year.

I think there is a "T" before the numbers on the left, so I would record it as T8904 TM 8906. I think it's probably an '89 Timberline, as you say. One interesting point is that the ubrake is on the seat stay, whereas a suspect '89 timberline made 3 months earlier which came up had a chainstay ubrake:

https://www.retrobike.co.uk/threads/help-identify-pre-90s-gt-frame-mid-90s-gt-frame.483707/

However, I would still think it is an '89 rather than a '90 because it has the TM model code, before they switched to numerical model codes for 1990, and top routed but not internal rear brake cable.