The "polarizing Trek" thread got me thinking. How the heck do Trek model numbers work?

I had always assumed that the lower first number (hundreds) was earlier years, and that the higher the last two numbers (tens and ones) was a higher quality bike.

So, for example, a trek 330 would be older and lesser quality than say a trek 870.

Then I went to look it up... And I was wrong, mostly.

In some of the older catalogs they specced the bikes by "component group" which made up the "ones" value in the model number, but I rarely see treks with anything other than "0" in the ones value.

Many years they produced many different model numbers, anything from 400-630 in 1983.

So... can anyone explain to me how trek model numbers work? Why did some years have 800s and others only went up to 600s? I tried looking it up, but I only found lots of info on the trek serial number.

IIRC trek moved to thousands when they moved to aluminum bikes?

With a few exceptions- Super easy until 1985-

First number is frame material
900 is Columbus/Columbus Fork & Stays
700 is Reynolds 531/531 Fork and Stays
600 is 531 main tubes with either Mangalloy or CrMo stays & fork
500 is CrMo/CrMo fork and stays
400 is Mangalloy or CrMo with Hi-Ten stays and fork
300 & 200 from the early days were Hi-Ten and with different dropouts.

800s were the All-Terrain bikes

The early bikes (until 78) were prefaced with TX and the frame material designation- they were all touring geometry- except the TX900 which was a racing frame (shorter chainstays)

The second number is the geometry type (78-85)
x0x is "sport"
x1x is "touring" and then "sport"
x2x is touring
x3x is Racing
x6x is racing
x7x is racing

The last digit was usually the component group- with the higher the number, the higher prestige of the group.
In 78 2 and 4 was Suntour VX (and different cranksets), 6 was Shimano 600, 7 was Campagnolo NR and 8 was Campagnolo SR.

For example, a 736 would be a racing frame with 531 frame, fork and stays, and the Shimano 600 group.

In 1986 a lot of that went kind of out the window- they started using 531 in 400 and 300 series bikes- my 86 400 Elance has a 531 frame with Tange CrMo stays and fork- essentially what a 600 series bike was in the years before.

The best explanation I could every have hoped for... thanks Golden Boy!

Excellent Post. Thanks.

So there was a 666 model in theory?

1985 til early 90's its not as detailed but.
400,500,600,some 700 Series are road (still same lower the number the lower level bike it was. except the 170 which was high...)
1000 series Aluminum Road
2000 series Carbon Road
800,900 series are MTB
700 Series can also be a multitrack, which is a 700c hybrid

after that you get into the thousands series stuff which can get confusing. or the new X.X (eg 1.2)

I feel like im missing stuff, i am in no way saying this is complete list just that after 85 there was some hierarchy also.

I think that one used a yellow and black color scheme.

I know in the early 90's at least, the 4-digit designations seemed to indicate non-traditional tube materials; i.e,. aluminum, carbon fiber composite.
1400 Aluminum (Road)
1420 Aluminum (Road)
1000 Aluminum (Road)
1100 Aluminum (Road)
1200 Aluminum (Road)
2100 Composite (Road)
2300 Composite (Road)
5200 Composite Competition
5500 Composite Competition

And of course the T-prefix was Tandem.
Not sure the span of years for which this is valid.

https://www.vintage-trek.com/images/t...ikecatalog.pdf

Old but interesting thread. Can anybody tell me what an 8000 model number means? Thanks in advance.

It was a mountain bike model in the 90s and 00s...not sure when it stopped. The ones I have seen from both the 90s and 00s were good quality- air forks, deore xt, hydraulic brakes early in the adoption, etc.

Thanks, I've found one with no front shock, and the owner states he has put newer components on, so maybe lost the Deore XT group.
Hmm.

IIRC the 1984 760 was a race bike with 531c adorned with mostly Suntour Superbe/Pro.

I absolutely am not an authority on anything connected to bicycles, especially TREK bicycles. However, that has not stopped me from studying Trek model numbering deeply and forming conclusion.

CONCLUSION 1: Recent Trek road bike model numbers are connected to the Madone line forking into two products.

CONCLUSION 2: Some of the Madone and Domane model numbers are the same.

SLR9 Madone and Domane
SLR8 Madone and Domane
SLR7 Madone and Domane
SLR6 Madone and Domane
SL7 Domane only
SL6 Domane only
SL5 Domane only
SL4 Domane only



GRIEVANCE 1: There is a difference between SL and SLR which is difficult to discover and remember.
I would like to take this opportunity to report that I communicated with Trek on this matter today.






Today's Domane bicycles have a shape similar to the shape of Madone bicycles, until that line forked into two models. The old Madone became the new Domane, and the new Madone is something new, breaking away from what Domane had been.

I thought Trek had moved beyond and discontinued anything resembling Madone 5-series or Madone 6-series in their road bikes. This was just plain ignorant of me, because right on their website they have for sale today:

Madone SL6
Madone SL7
Madone SL9

While I was at it, I was looking at the Domane lineup, and it looked to me like the Domane has lines similar to the Madone 5.2 I ride:



Then I noticed for sale today, in 2021:
Domane SL4
Domane SL5
Domane SL6
Domane SL7
Domane SL9

That got me wondering what the differences and similarities are among these.

The first think all these have in common is their frames are shaped the same way as the Madone 5.2 from way back in 2009. That got me wondering when this shape originated. To me, it looks like it was first made public in 2008:



Once I knew when we first got the bike that looks like today's Domane,
I got to wondering what the Madone looked like when it first came out.
The earliest reference I can find in the Trek bike archive is 2004. This Madone is numbered 5.9, so maybe there are models that came before it, I just do not see them: