Scott Plasma 3 Stack/reach and Fit?

Triathlon Forum
1

I am looking at the new Plasma 3 and I am wondering how much flexibility this frame gives you with various fits.
Does anyone know what the reach and stack will be for their size L? I find this frame much more interesting than their older models since they moved away from the ISP

2 
reach

S: 390
M: 415
L: 430
.

3

http://img412.imageshack.us/img412/3167/screenshot20101013at516.png

Scott’s website/google is your friend. :wink:

4

I am looking at the new Plasma 3 and I am wondering how much flexibility this frame gives you with various fits.
Does anyone know what the reach and stack will be for their size L? I find this frame much more interesting than their older models since they moved away from the ISP

http://university.tri-sports.com/2010/10/13/scott-plasma-3/

Fit on the bike trends toward the larger interpretation of the size names. This is a “T-shirt” sized bike in small, medium and large. The mediums we received and tested ran high and short with a 56 cm total center to top seat post, an effective 54 cm (center to center) top tube and a high-ish 14 cm head tube that does include the stem clamp. Four stem sizes are to be offered. If you are shorter than 5’6” you probably won’t be riding this bike. For my 5’9” height and torso to leg length ratio I would be on the Small frame size. Each of the sizes offers ample fit latitude owing to the variable geometry seat tube angle and the adjustable reach Profile Design aerobars.

John

5

thanks interesting read. I am surprised by his recommendations. according to Scott’s website I would be on a L at 6’2. However they only list the reach but not stack.

6

For what its worth I’ll suggest Scott’s recommendatiions trend to the too large.

7

thanks interesting read. I am surprised by his recommendations. according to Scott’s website I would be on a L at 6’2. However they only list the reach but not stack.

That’s because the stack is VERY flexible. Stack is always more malleable than reach. LOTS of ways to make a bike shorter/taller. Only way to make a bike longer/shorter is to change stem length. So I’m not surprised they only list reach.

8

Dan wrote an article on the trend away from buying bikes by the “smallest tenable” frame size, as in the old recommendations in books by Greg LeMond and Kent Gordis.

Do you know where that article is on this forum Sir?

9

Dan wrote an article on the trend away from buying bikes by the “smallest tenable” frame size, as in the old recommendations in books by Greg LeMond and Kent Gordis.

Do you know where that article is on this forum Sir?

http://www.slowtwitch.com/Bike_Fit/General_Fit_Articles/In_between_bike_sizes__1173.html

10

Did anyone answer/solve the stack question?

11

Can someone tell me what this means:

Fit on the bike trends toward the larger interpretation of the size names

Does it mean the L comes out quite large? Or is their interpretation of what large is actually too large … making the frame smaller?

Confused? :slight_smile:

12

Bump, as i am confused too. Does this mean that a Plasma Premium in size M is more like other brands size L?

13

Just throwing some figures out there but …

The standover height is 78cms on size Small, 81cms on the size Medium and 84cms on size Large.
The raised stems raise by 4cm on all sizes but the stem starts 3cm below the stand over height.
The BB offset to the wheel skewers is 6.5cm
The distance between wheel centre and bottom of tire on 700cc wheels is 34cm (I think, from measuring my current bike)

If we use the figures on Scotts geom page http://www.scott-sports.com/...t/10054/55746/218124

we can work backwards …

STACK =

81.0cm (Standover for a Medium)

  • 3.0cm ( head tube drop from top tube)
  • 34.0cm (ground to wheel skewer centre)
  • 6.5cm (BB Offset to wheel centre)

= 50.5cm on a medium frame (minus 3cm for a small, plus 3cm for a large)

The 4cm raise on the stem takes stack height at base bar centre to 54.5 on a medium (again plus or minus 3cm for the other two sizes)

After that it’s a case of using bars to increase or decrease the height. The reach was spot on for me so I went for the relatively tall Brezzas (adding 5cm to stack once at pad height) with potential for risers after that if necessary.

Like Rappstar mentions, the stack is pretty adjustable from very low bars with very little stack through to something like a Brezza that can have 14cm or more stack height if required.

It is less adjustable by reach though. Only two stem lengths available for a 1.5cm of difference. So, again, the position of the pads relative to base bar will start to play a part. And it seems that bars tend to go for stack adjust or reach adjust, not many of them doing both well.

I think the relatively low stack compared to usual Scott frames is possibly indicative if the trend to use risers under the bars rather than chunky head tube / stem tube? Just a thought.

Bear in mind that the ‘zero rise’ bars may be available now or shortly so that would allow a flat top tube to stem and reduce the stack at base bar centre by 4cms

I’ve posted these as a bit of a guide, they are not gospel obviously so use caution. Also, with so many figures floating around I hope my calculations are correct. Let em know if you see any issues.

Hope that helps!

14

thanks interesting read. I am surprised by his recommendations. according to Scott’s website I would be on a L at 6’2. However they only list the reach but not stack.

I’m 5’11 and was on a Medium Plasma 3 with the shorter stem. Your stack is going to be dependent on your aerobar choice, due to the design. If the reach works, then you’ll just need to get an aero bar that brings you up high enough. I seriously doubt that you will want to go lower than a bar like a Pro Missile, but the Pro Missile EVO that they often show it with provides tons of stack and reach options. It’s a quite aggressive frame.