Initially the yamaha version was designed for motocross to extend wheel movement, and this led to a wide variety of alternative rear suspension systems by several manufacturers. Trail cannot be a negative number as this will adversely affect handling unless you are building a shopping cart. Changing the geometry of a motorcycle through wheel size, raising, or lowering will change the trail. This means that the software is easy to use with a practical approach. Cannondales murray washburn explains how rake and trail impact a bike s handling. Motorcycle setup software for optimizing the suspension system and whole bike kinematics. Jan 19, 2016 quite often in sport rider road tests and comparisons we refer to various aspects of a bikes geometryrake, trail, wheelbase, center of gravity, antisquat, and so onwithout offering an. The antisquat calculator shows results for two geometry setups, displaying a. Not to be confused with the curvature of the fork blades, which some people think of as rake. Touring bikes 5570mm trail road bikes 5060mm trail cx 5565mm trail.
Spec is software for tuning motorcycle suspension and chassis geometry. You can control the power with a simple touch of a button and the chassis is so optimized that you feel in control in any situation giving you the most precise feeling of riding. Differences in geometry are what gives a bike its unique ride characteristicshence the reason why seeminglysimilar bikes feel very different out on the trail. Rake and trail definition by babylons free dictionary. Fork rake is also known as offset, which more accurately describes what it is. A while back i took a deep dive into comparing the geometry of modern trail bikes and more recently, i delved into the same topic for enduro bikes. This is evident through the slacker head angles and higher trail than both road and cyclocross bikes.
Race teams keep track of setup and geometry changes using some form of software that calculates. Motorcycle software dans free motorcycle repair course. In the future, we see the project as a online shop or service with which you can easily build and. Motospec is software for tuning motorcycle suspension and chassis geometry.
The grabcad library offers millions of free cad designs, cad files, and 3d models. Zero one racing motorcycle chassis and suspension software. Trail is the bikes caster force that keeps it going straight. Jul 15, 2019 to evaluate the 2020 harleydavidson livewire, you need to let go of everything you know and everything you think you know about harleydavidson. Motorcycle rake and trail calculator data for motorcycles.
Bikers often talk about these terms and if youre alien to this concept, here we bring you an indepth of the topic. Quite often in sport rider road tests and comparisons we refer to various aspects of a bike s geometry rake, trail, wheelbase, center of gravity, antisquat, and so onwithout offering an. In the table above the bike geometry setup can be compare and edited in a single view. Softtail is the term used to describe a motorcycle frame with an active suspension. It is an svg version of the jpg listed below, made because svg offers higher image quality and greater ease of editing. Yamaha just launched its first electric bicycles outside online. Ultimately you want a geometry that doesnt have the bike fighting you into and out of the turns. When you are in need of a reliable replacement part for your 2005 nissan xtrail to restore it to factory like performance, turn to carid s vast selection of premium quality products that includes everything you may need for routine maintenance and major repairs. Sport bikes have around 24 degrees of rake while cruisers land around 30 degrees.
I am often asked about the differences between hardtail and softtail frames. When rake is added to a motorcycle, trail is often increased causing steering to become heavier. Using this model, manoeuvres for different values of wheel geometry parameters, were simulated. You can now search by numbers enter your geometry criteria and see the bikes that match. There are also inserts to reduce the rake to 23 or 23.
This allows us to quickly see the effects of changes to suspension components such as the triangle rocker size, dogbone lengths. This excel version calculates trail based on input values for rake, offset and front tire radius. It has a major effect on the handling of the bike, and to achieve the fastest possible race setup, setting up the trail correctly is paramount. We were thinking the bike has too much trail but i noticed chuck has even more trail in his numbers. So, here is a quick comparison between the two that explains their primary differences and includes a quick reference chart. The suspension is fastened to the frame via a horizontal axle that allows it to pivot see softtail illustration. Rake and trail terms refer to motorcycle steering geometry, and, along with offset, have a great effect on the machines handling and steering effort. Various harley models have the following trail figures. And on the subject of professionals, there are apparently at least 200 of them, all around the world, using currys software. Calculate frame geometry of an existing bike through simple xy measurements. If updates to the geometry are made midproject, the software can usually. Pdf the design of a motorcycle featuring fully independent. Modelling various geometry of motorcycle suspension front and rear.
Back in the day, 3 6 extended tubes were an inexpensive and pretty common thing. This programme calculates the mass centre, moments of inertia and weight distribution of a motorcycle when the masses and cog locations of various components are input. This tech tip explains the differences between the three basic rail systems used on trail bridges and boardwalks, discusses forest service requirements, and provides a simple process for determining the basic rail system that best fits a particular structure. Important values such as rake, trail, wheel base, swingarm length and swingarm slope, front and rear ride height are measured with the mega m. A touring bike s geometry is optimised so that its stable carrying front and rear loads. Calculate a full chart from the often sparse geometry chart provided by the manufacturer. This mechanic workshop is well known for overhauling engine, fixing lights, indicators, taillight and horn, change spark plugs, battery or electric wiring, it will be done. This page has motorcycle setup sheets and downloads that are useful for keeping.
Motorcycle setup software motochassis by tony foale. The accuracy and steps size between the rows can be modified. This programme calculates steering geometry parameters. System is capable of measuring the geometry of the motorcycle chassis. The suv model was validated by comparing simulation results with the standard graphs from literature. Project bike 3d configurator created so that you can build your existing or future bike with modern technology and 3d graphics. How to shim motorcycle rear suspension to adjust geometry. Sep 02, 2009 rake is the angle of the steering stem that holds the frame and front end together as a pivot point.
Geometry on the 2016 zx10r page 4 kawasaki zx10r forum. Geometry of bike handling calfee design bicycles, components. Castor, often called trail is the distance from the center of the axle to the center of the contact patch. May 01, 2020 trail is the distance between the tyres contact patch with the ground and where the head angle line hits the floor. The ibc section 10, guards, requires stairs, platforms, and landings higher than 30 inches to have guards rail systems at least 42 inches high measured from the leading edge of the tread to the top of the guard. Yamaha just launched its first electric bicycles outside. Im getting tired of running around updateing links. City riding, cobble stones streets, across trains track, on and off sidewalks or trail riding, through mud, slippery slopes, rock gardens, sand or snow are never a problem anymore. Test how fit is affected by adjusting or changing components.
To the point is a new series of articles that explains the ins and outs of your bike every tuesday. Downloads motorcycle data acquisition data for motorcycles. Rake trail calculatortrail is an important dimension in motorcycle chassis design as that value has a large effect on how the motorcycle will handle. This number changes depending on extension of the front and rear suspension, ie with the angle of the frame, but is normally stated with the chassis in ballance, ie average weight rider, preload set to normal, no breaking or acceleration. Trail is defined as the distance the front tires contact patch trails the imaginary point where the steering axis intersects the ground, as shown in the diagram at right.
Xtremepowerus 49cc 2stroke gas power mini pocket dirt bike dirt off road motorcycle rideon pixel dirt 3. Wheelbase is the horizontal distance between the centers or the. With this bigger battery we have recorded up to 115 miles of range with one charge. I wrote non of these, and all have been presented, for free, on the internet. The modern era in suspension design was initiated when yamaha announced their cantilever system, and employed just one suspension unit monoshock.
Quite often in sport rider road tests and comparisons we refer to various aspects of a bikes geometryrake, trail, wheelbase, center of gravity, antisquat, and so onwithout offering an. Suspact, motorcycle geometry software, motorcycle chassis design. Headons might just get more difficult to twitch away fromeek its all about style though. See how bike geometry changes during hard braking, and easily adjust suspension to cope with. The three basic rail systems are based on the 2006 international building code ibc 10, guards, the american association of.
Shimming motorcycle rear suspension to alter chassis geometry. The distance defined by the vertical line from axle to ground and the intersection of centerline of the steering neck and ground. Get bike mechanic moto workshop 3d microsoft store. Bikecad lets you design your dream bicycle online, for free. When you are in need of a reliable replacement part for your 2004 nissan xtrail to restore it to factory like performance, turn to carid s vast selection of premium quality products that includes everything you may need for routine maintenance and major repairs.
Join the grabcad community today to gain access and download. Mtb frame geometry explained mountain biking australia. But before we get started, id like to lay some ground work for the technical terms we shall be discussing. This allows us to quickly see the effects of changes to suspension components such as. Oct 04, 2017 modelling various geometry of motorcycle suspension front and rear. All chassis dimensions and specifications are editable. The fat sport has the integrated battery, long run, with 630wh.
Fat sport integra is the results of the experience of the fantics history brand. If youre new to bike trials, this guide will hopefully provide you with a better understanding. Design of motorcyle active chassis geometry change system 282 geometry. This is evident through the slacker head angles and.
Tables can be presented of front and rear suspension forces, rates and ratios. Spec is software for tuning motorcycle suspension and chassis geometry motospec has been designed for racing use, with a simple interface and clear outputs, to assist motorcycle tuners and race teams make quick and knowledgeable decisions. Because of a fortuitous combination of factors in bike design, as a rider leans in a particular direction, the bikes trail will tend to turn in that direction, putting. Primary among these are wheelbase, steering axis angle, fork offset, and trail. This software calculates the cog position based on data from weight. New school geometry is not like a new standard like boost or 27.
Next in the equation 1, there is the air resistance, whose main component is a quadratic velocity vr, an input factor of driving. Motospec has been designed for racing use, with a simple interface and clear outputs, to assist motorcycle tuners and race teams make quick and knowledgeable decisions. Changing one thing at a time is the first rule you learn in motorcycle setup, but. Bike trials is an unusual sport that differs considerably from other cycling disciplines, and as such, the geometry of trials bikes is considerably different from most other kinds of bikes. When talking about motorcycle geometry and dynamics, rake and trail are two names that cannot be ignored. Upgrade 3d sports trail and dirt bikes into finest tuneups, repair and customize your sports chopper motorcycle with extra gadgets used in the dirt and heavy motorcycles. Download the motorcycle rake and trail calculator here.
A happy medium of the proper rake and trail maintains stability, while allowing the motorcycle to turn without too much effort. Bicycle and motorcycle geometry is the collection of key measurements lengths and angles that define a particular bike configuration. The steering effort, steering wheel returnability and lateral forces produced by the tires were obtained in order to predicthe t the. Rake is the angle of the steering stem that holds the frame and front end together as a pivot point. Spring rates, preload, top out springs, steering geometry, cg position, antisquat and many other parameters are input or calculated. It mightnt seem as exciting as an allnew suspension linkage, or as visually obvious as a topend eagle 12speed drivetrain, but frame geometry can make or break any bike from the outset. Trail is the distance the contact patch of the front tire lags behind the point where the steering axis intercepts the ground consider the casters on a shopping cart. The most common way to adjust trail on a street bike is by adjusting ride height as road bikes have a limited amount of adjustable components. It does raise the front a bit, but not much and imho, a nice look. These rail systems are recommended on trail bridges in urban settings or highuse areas figures 1 and 2. Motorcycle rake and trail calculator thompson choppers. Ebikes are a good example of new stuff what is easy to sell because you can. A touring bikes geometry is optimised so that its stable carrying front and rear loads. Trail is an important dimension in motorcycle chassis design as that value has a large effect on how the motorcycle will handle.
Increased trail in the 6 range, quick steering maneuvers would suffer, however. A new thing is going to be pushed to market if the dealers see something that is easy to sell. Fullyfunctional free trial and chassis dimensions for most racing and motocross. Whats the difference between trail bike and enduro bike. To level it back off a 3 headset cup would actually increase trail to about 6. The brose drive s engine adds power to your legs and the battery offers the maximum duration available on the market. Supact motorcycle geometry software is developed in a racing environment. Rake, trail, wheelbase, center of gravity, antisquat, and so on are all important measurements of a motorcycles geometry.
A frame shop, customchopper builder could get you dialed in. Change components, experiment with colors, see how suspension works, show your friends, create the bike of your dream. Home zero one racing motorcycle chassis and suspension. Whether its an aframe or swingarm configuration the principles are the same. Raketrail calculatortrail is an important dimension in motorcycle chassis design as that value has a large effect on how the motorcycle will handle. These parameters have a major influence on how a bike handles.
In order to bring trail figures back into line, triple trees with raked steering stems can be used. You want to watch for wheel flop along with handling issues related to rake trail, so again do your homework. Bicycle trail is the most important part of a bicycles geometry for determining how the bicycle will handle. Aftermarket components like yokes and linkages can be measured and input by the user. A diagram to demonstrate the effect rake offset and head tube angle have on the trail of a fork. To make sure your vehicle stays in top shape, check its parts for wear and damage at regular intervals and replace them in time. If you are having to put pressure on the handlebars in the middle of a constant radius turn to keep the bike from either trying to fall into the turn or stand up through it then you have a geometry problem.