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Compact Geometry

Lighter, stiffer and more beautiful

Compact Geometry is the hot new fashion in road racing frame design, and like good fashion statements look stunning. However, compact geometry has solid performance benefits of smaller, stiffer, lighter frames, making you faster and better looking.

The ‘feel’ of any bike is largely down to it’s centre of gravity, wheelbase measurement and individual steering geometry (the net result of front wheel radius, the head tube angle and the fork rake). Bikes must ride correctly, but also maximise your comfort and power delivery through the correct relationship between the crucial contact areas; The relation between saddle and bottom bracket, and the distance between the saddle and the handlebar grip positions. There is no set geometry to for perfect handling, so many frames look quite different, even if they handle similarly.

The benefits of compact frames

Many manufacturers, offer a wide choice of frame sizes, down to 1cm increments. This is possible only with premium price frames from small workshops whose customers are prepared for high costs and long lead times.
This is impressive, but unnecessary, complicated and expensive, offering little real improvement in end performance and poor value to you the consumer.

Our sloping top tube ‘Road Compact Geometry’ frames are designed to meet riders physical demands, and we offer them in sizes from 48cm up to 64cm – covering 95% of body sizes, in four sizes; small, medium, large and extra large. Fine fit is achieved with seat posts and stems.

Compact geometry

Our Road Compact Geometry frames are lighter, as less metal is used, and stiffer a stiffer thanks to the smaller triangles. Last, but by no means least, our compact geometry frames with their slightly sloping top tubes, look the business too, and let’s be brutally honest, that’s pretty important…

MERIDA Road race frame geometry comparison

Equivalent sizes are marked
with identical colors
       
Real-seat length, from center of bottom-bracket to top-end of seat-tube.




CT
SIZE (SEAT-TUBE Center of BB/top of ST) 48 52 54 56 58 60 63
AH Toptube Length (horiz.), center to center 525 525 545 560 575 585 592
L Headtube Length 120 120 130 150 170 185 215
Q1 Headtube Angle 72,5 72,5 72,5 73,0 73,0 73,5 73,5
CT Seattube Length (center of BB/top of ST) (CT) 480,0 520,0 540,0 560,0 580,0 600,0 630,0
Q7 Seattube Angle 74,0 74,0 73,5 73,5 73,0 73,0 73,0
D Rear-Base 408 408 408 408 408 408 408
H BB Drop 68 68 68 68 68 68 68
G Fork Length 370 370 370 370 370 370 370
G Fork-offset 45 45 45 45 45 45 45




 
Named size
in compare to traditional frame-size
XS
45 - 48
S
49 - 53
M
54 - 56
L
57 - 59
XL
60 - 62
XXXL
63-65
AH Toptube Length (horiz.), center to center 520 530 555 575 590 605
L Headtube Length for integr. HS 105 125 145 170 195 215
Q1 Headtube Angle 71,5 72,5 72,5 73,0 73,0 73,0
CT Seattube Length (center of BB/top of ST) 450,0 480,0 500,0 525,0 555,0 575,0
  Sloping TT angle (to horizontal) -9,0 -9,0 -9,0 -9,0 -9,0 -9,0
Q7 Seatube angle 74,5 74,0 73,5 73,5 73,0 72,0
D RC 405 408 408 408 408 408
H BB drop (axle of BB 275 mm over ground) 61 61 61 61 61 61
G Fork length 370 370 370 370 370 370
F Fork-offset 45 45 45 45 45 45




 
Named size
in compare to traditional frame-size
XS
45 - 48
S
49 - 53
M
54 - 56
L
57 - 59
XL
60 - 62
AH Toptube Length (horiz.), center to center 518 530 555 575 590
L Headtube Length for integr. HS 120 130 155 180 205
Q1 Headtube Angle 72,0 72,5 72,5 73,0 73,0
CT Seattube Length (center of BB/top of ST) 470,0 500,0 530,0 560,0 590,0
  Sloping TT angle (to horizontal) -4,8 -4,8 -4,8 -4,8 -4,8
Q7 Seatube angle 74,0 74,0 74,0 73,5 73,0
D RC 405 405 405 405 405
H BB drop (axle of BB 275 mm over ground) 61 61 61 61 61
G Fork length 370 370 370 370 370
F Fork-offset 45 45 45 45 45