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Both look like great rides. I'd like to try a modern MTB sometime, but ride off road so little that I can't justify one. My newest MTB is at least 15 years old, a Serotta Ti SoftTail. I was surprised at how much faster even it is compared to a 90s hardtail. I'd expect a similar jump in...

Wheels would give the most performance gain. Lightening non rotating parts will only be noticed with a scale, especially where it's pretty flat. My take on upgrading an already nice bike is to wait until something wears out, and upgrade there if you wish.

Thanks. It's a fairly recent eBay find, nearly perfect condition. Love the old hardtails for their simplicity and reliability.

Hope that Brian can locate the missing page.

The old standard was to measure either to the center of the top tube or the top of the top tube. Once sloping top tubes and materials other than standard diameter steel tubes came into play, new systems were developed. For example, Serotta always used a nominal size that was based on a level...

Nice selection. I looked at a PX10 for my first road bike but ended up with a Cannondale. I really like the Sachs stuff, just picked up a NOS Rival crank a couple of months ago. You must have put the XC on the GT. I think SunTour was out of the new bike market by 1997. Here's my Stumpjumper...

On the road frames, the nominal size was from crank center to about 1" below the top of the seat tube. I checked a 60 cm 2005 CAAD7. The seat tube measures 62.5 cm to top of seat tube. I think MTBs are similar, but would have to check one to be sure.

We can't tell much from the serial number beyond year and size. Picture of the whole bike and list of components will be the best way to start.

Here's a 2.8 I have that's in the year range for same serial number configuration. I need to check a couple of others. It's essentially a 1995 R800, but has an aluminum fork instead of the carbon fork the catalog shows. It's also a bit of an anomaly, as it has no model decal on the top tube...

I found a 56 cm offered on another forum a couple of years ago. It's a 2012, so has more white, less green. Checking with owner to see if he still has it.

Will keep an eye out. Size range?

Did you take the serial number picture of the 52 cm frame? Since it doesn't show the whole width of the BB shell, I'm not convinced that there is no separate two letter code. The two letter codes on my frames are well to the left of the frame code. Does the 52 cm bike conform to a 1999 model...

Wondering if it could be a 2001 R600 with an added Saeco decal. We've seen bikes before that have paint that doesn't match the catalog models. Cannondale did spec Daytona on the 2001 Chain Gang, but it was a CAAD5 frame. Perhaps they had some extra groups and put them on some CAAD4 Saeco frames.

I would think it's a 56. Seat tube should measure 58.7 cm center of bottom bracket to top of tube. From 52 to 60 the seat tube of each size will vary by 1 cm. So if your seat tube measures 57.7 it's a 55. You will have to elaborate on the fork. Early CAAD4 frames had a 1" head tube, while...

I think your serial number conforms to the example for 1993-1999, with the exception that the example doesn't show the frame size. I have a 1999 R40000 CAAD4 and a 1998 R4000 CAAD3. They both have the size included in the frame code as the last two digits. On my CAAD4 the size is preceded by a...

Here is a photo of the 2002 Headshok frame geometry chart. 2003 is the same. There are almost limitless ways to build a gravel bike. I still like to use a triple or sub-compact crank and 10 speed wide range cassettes. Lots of folks are going 1X with the modern SRAM and Shimano 40+ T...

Might be tough to find one that short. There's one on ebay that is 100 mm. https://www.ebay.com/itm/Cannondale-System-Six-Carbon-Fiber-100mm-5-Stem-OS-31-8mm-1-1-8-SUPER-STIFF/183890986585?hash=item2ad0c1c659:g:EGAAAOSwLztdMfRv

Not sure what would be in the owner's manual. They usually just have safety and warranty information. What do you want to know about the bike? F800SL should be a CAAD5 disc frame with a Headshok Fatty Ultra DL fork. Should make a great gravel bike. Are you thinking of 650B wheels or 26"?

Good to know. I didn't think about the possibility of the team using colors that were not available on production bikes. Would be interesting to know the reasons for switching from red to blue.

I only have this one: