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Trek 520 trivia question; what year did they...

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Trek 520 trivia question; what year did they...

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Old 04-12-24, 11:50 PM
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abdon 
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Trek 520 trivia question; what year did they...

moved from lugged fork to the unicrown fork?

I do know that '93 was the last year of the lugged frame, and that '83, '85, and '86 had sidepull brakes, but I'm missing the fork info
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Old 04-13-24, 01:03 AM
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1989, lugged fork:

1990, unicrown fork:
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Old 04-13-24, 04:26 AM
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Originally Posted by philpeugeot
1989, lugged fork:

1990, unicrown fork:
Phil with the win!
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Old 04-13-24, 10:34 AM
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Follow-up trivia question, when did they change to a slanted top tube?
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Old 04-13-24, 10:39 AM
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Originally Posted by abdon
Follow-up trivia question, when did they change to a slanted top tube?
did every size get a sloping TT or just smaller ones?
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Old 04-13-24, 10:43 AM
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Originally Posted by Bianchigirll
did every size get a sloping TT or just smaller ones?
I think every size. this is a late 520 and this one is certainly not small.
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Old 04-13-24, 03:14 PM
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It looks like between 2007-2009

https://www.vintage-trek.com/trek-fi...ein-lemond.htm

this brings you to the vintage trek catalogues up to 2012
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Old 04-13-24, 04:25 PM
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abdon That's actually kind of well.... not exactly pleasing to my eye. I wonder if this was done to use the same frame for both Hybrids and touring bikes.
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Old 04-13-24, 05:18 PM
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Originally Posted by Bianchigirll
abdon That's actually kind of well.... not exactly pleasing to my eye. I wonder if this was done to use the same frame for both Hybrids and touring bikes.
we are on the same page. I'm building a database of vintage touring bikes and I stop tracking when the lugs stop. I make a reluctant allowance for forks.
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Old 04-13-24, 07:46 PM
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Originally Posted by Bianchigirll
abdon That's actually kind of well.... not exactly pleasing to my eye. I wonder if this was done to use the same frame for both Hybrids and touring bikes.
It's a time-honored design. From 1892:

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Old 04-14-24, 10:21 AM
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Originally Posted by Bianchigirll
abdon That's actually kind of well.... not exactly pleasing to my eye. I wonder if this was done to use the same frame for both Hybrids and touring bikes.
Everyone seems to want to find a nefarious reason for sloping top tubes. Often people say "they went to sloping top tubes so that they could offer fewer frame sizes," but the number of frame sizes offered remained the same or actually increased. This one is kind of new but geometry comparisons don't hold up. Sloping top tubes are used to get a little more stand over height with a slightly stiffer frame and a bit of weight savings. Sure, it saves the companies a little money in materials as well but that's not a bad trade-off.
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Old 04-14-24, 12:38 PM
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cyccommute Did simply producing all MTB frames to be "suspension ready" have anything to do with it?

I never said anything about sizes just using the same frame for a road bike and hybrid, similar to how many brands already used the same frame across several road bike models.
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Old 04-14-24, 01:34 PM
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Originally Posted by cyccommute
Everyone seems to want to find a nefarious reason for sloping top tubes. Often people say "they went to sloping top tubes so that they could offer fewer frame sizes," but the number of frame sizes offered remained the same or actually increased. This one is kind of new but geometry comparisons don't hold up. Sloping top tubes are used to get a little more stand over height with a slightly stiffer frame and a bit of weight savings. Sure, it saves the companies a little money in materials as well but that's not a bad trade-off.
I don't know about nefarious. Heck, I don't even know about people wanting to know why. I happen to be a huge fan of the classic double triangle straight tube frame. Which is mighty convenient as there are not many slanted top tubes in the years I prefer.
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