EVO frame differences

[Thunderchild]

In my quest for an EVO, I have noticed a couple of frame differences.  One looks like a 5000 frame with the cut-outs near the shock mounting location, and the other does not have the cut-outs.  Could the frame model without the cutouts be a newer model and the one with the cut-outs the same as the 4000-5000 series?  Also, the top tube angle and connection to the head tube.  Possibly the angle of the rear shock relative to the main triangle?  Anyone?

I am comparing a couple on Ebay. 

Thanks

Thunderchild

[RhinoDave]

The small and medium frames did not have the cutouts you describe. They were on the large and way big frames. If you go to The links and click on Dave Tweeds site. It will give you all the exact dimensions and geometry for the different sizes. The Evo model frames didn't change from 1999 through 2001. If you look at my Evo in the gallery, it is a small so the shock mount is in the seat post support section of the frame. The angle is different because of the different frame sizes.

[Thunderchild]

Thanks that is what I needed.  I hadn't explored Twede's website. 

Thunderchild

[Thunderchild]

So this baby(link below) is a medium.  I almost went for it as it is listed as an 18 inch which is usually my size.  http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=220205061994&ssPageName=STRK:MEWA:IT&ih=012

Thunderchild

[kiwi]

14= small,16=med,18=large,20 = way big....

[RhinoDave]

I've found that numbers on a sheet of paper or even on a decal on a frame don't mean much if you don't fully understand what is actually used as reference points. I have a small 856 which, like Kiwi stated, is a 14" frame it still has the decal on it stating that. The trick is figuring out what exactly that means. The actual measurement from the middle of the BB to the top of the seat tube is just about 18.5" which makes the 14" a bit misleading. I am guessing that this measurement(14") is derived from creating a straight line along the top tube to where it crosses another straight line from the BB to the seat tube and then measuring from that point down to the center of the BB. it can be somewhat confusing. The same can be said for the measurements on the EVO frames. A small is listed as 450mm C to C mine actually measures 450 to where the seatpost and the seat post support bracket are welded together. this is slightly more than 17.7 " the medium frame, assuming the same measurement standard, is 467mm and would measure 18.3" to the same point. Someone not real familar with the frame could call either one an 18" frame even though one is a small and the other a medium. The more critical dimension is the top tube length. I always ask what the top tube measurement is and if it is an actual measurement or effective measurement.

[kiwi]

i beleive the proflex sizes are a virtual centre to top,based on a non existent flat top tube

[Colin]

i beleive the proflex sizes are a virtual centre to top,based on a non existent flat top tube

Yep

[Colin]

In my quest for an EVO, I have noticed a couple of frame differences.  One looks like a 5000 frame with the cut-outs near the shock mounting location, and the other does not have the cut-outs.  Could the frame model without the cutouts be a newer model and the one with the cut-outs the same as the 4000-5000 series?  Also, the top tube angle and connection to the head tube.  Possibly the angle of the rear shock relative to the main triangle?  Anyone?

I am comparing a couple on Ebay. 

Thanks

Thunderchild

IMHO
I think the difference you're talking about here is the upper mount point for the shock? i.e. the underside of the seat post mast?
If so, I disagree with the RhinoDave's comment.
This difference is not size related, it is model related.
4000's and 5000's and early EVO's had an Un-notched mast.
Later "True" EVO's & Disco/Flying Monkey's do have the cut-out.

see diagrams

http://idriders.com/proflex/files/4000.pdf

http://idriders.com/proflex/files/00evoframeassembly.pdf

Both frames are listed in ALL sizes (Small, Medium, Large, Way Big)

I'm occasionly motivated to buy a true later Evo frame 'cos I reckon it would be a cinch to fit a long travel shock....?

Col.

[RhinoDave]

Here's a couple of pictures to clarify what I was talking about. I was talking only about the EVO frames. The large and way big frames need an extra plate with cut out areas similar to the 1998 large and way big 4000 and 5000 series frames to mount the top bolt of the rear shock. The small and mediums mount inside the seat tube support detail and do not have the extra mounting plates. First picture is of a large that recently sold on EBay and the second is my small frame. Exact same model and year with different configurations because of size. The PDF for the EVO only shows a small or medium frame. Hope this helps.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200203234756&indexURL=0&photoDisplayType=2#ebayphotohosting

My small frame