| There are some basics to bike frames and bike | | | | the length of the rider's leg, but since the compact |
| geometry, which no matter what, we would be wise | | | | frame was designed for giant bikes, this has no more |
| enough not to play around with. Certain dimensions that | | | | been the case. The length of the top tube is more |
| we just cant mess around with, because the slightest | | | | important to the fit of the rider, as we use a longer |
| of variations can cause and affect the handling of the | | | | seat pin to make sure that the saddle is at the correct |
| bike in unimaginable ways. Changes can make for a | | | | height. |
| dangerous bike that may not be able to corner | | | | With a slopping top tube we need to draw a horizontal |
| properly, or descend safely, or may make for a bike | | | | straight line from the head tube, towards the top of the |
| which is so close at the front-end that we might end | | | | seat tube, or actually where the top tube would be. |
| up catching our foot in the front wheel. | | | | Bike geometry is a complex subject, and cannot so |
| It would only be safer and wiser to stick with the basic | | | | easily be played around with. |
| bike frame rules, while playing around with designs. | | | | Bike Frames & Seat Angles |
| Different frame manufacturers have different ideas as | | | | The smaller the size of the frame, the steeper the |
| to what bike geometries should be applied, but certain | | | | angle of the seat tube is likely to be. Small frames |
| dimensions even they don't mess around with as such. | | | | work well for short riders with shorter thighs, so they |
| Never Mess Around - Basic Frame Size & Bike | | | | can sit further forwards for some comfortable |
| Geometry | | | | pedaling. Tall riders need a much laid by angle, since |
| We would better keep in mind never to mess around | | | | their thighs are longer. |
| with the length of the chain stays, or the distance | | | | A relaxed angle is bound to give you a more |
| between the back wheel axle and the bottom bracket | | | | comfortable ride, but the most important thing is that |
| axle. The other is the distance between the bottom | | | | the rider's knee has to be over the pedal, or else we |
| bracket, and the front wheel. The chain stays of the | | | | will not be able to get the correct leverage, and this is |
| bike must be fixed around the (F) 42cm. | | | | exactly what regulates the seat angles. |
| The total wheel base for a normal road bike with 700c | | | | This is the science involved in frame building; the frame |
| wheels must be around (G) 100 cm and which can | | | | should fit the rider, and within reason, must stay within |
| vary between 98 cm to 104 cm depending upon the | | | | these parameters so that the frame may perform |
| overall frame size. This length may however be | | | | perfectly. However any change must keep in mind that |
| changed, keeping in mind the kind of changes they | | | | cornering, climbing, descending and other performances |
| might bring upon. | | | | expected of the bicycle frame and geometry do not |
| Bike Frames | | | | get disturbed, or go hay-wire. |
| Earlier the length of the seat tube used to depend on | | | | |