Supermoto Tech | AAA Racing

Here is some useful technical data for all the Goldspeed Supermoto Tyres we distribute

Q Why should I use specific Supermoto tyres on my Supermoto bike?

A Supermotos are lighter, slower but often achieve greater lean angles than most sports bikes. If you remember that "...colour is the only real common aspect between a Supermoto tyre and a Supersport / Superbike tyre!" you'll be fine. The compounds used in Goldspeed Supermoto tyres are specific to the lighter carcass (hence weight) and the different operating temperature of Supermotos. You need tyres that are sticky at 20 mph in tight hairpin turns and round-abouts whereas other tyres need stability at 150+ mph. Consequently the compounds and profiles are very different and your bike will behave differently with a specific set of SM tyres. The profile of the front tyre in particular is influential on how your bike will turn

Q How do I know which tyre is best suited for my bike from the Goldspeed range?

A We always say use the 80/20 rule. What we mean by that is; work out where you will ride your bike 80% of the time and buy tyres to suit that application, whilst accepting that you'll have to compromise on the other 20%. For example, if you use your bike to commute in all weathers and want to do one trackday a year, then buy road, all weather tyres and accept that you won't be setting the fastest lap on your trackday! The alternative is two sets of wheels as you can choose tyres specific for the current application - but most people don't have this luxury with their road bike.

Q I'm concerned about the clearance between the chain and my back tyre. It looks very tight for space and I'm not sure a 160/60 Goldspeed will fit in there without touching the chain. Can you help me?

A Yes we can, but this is a subject all on its own; Please read our Chain Clearance Guide below, which may help you understand things a little better

Q I've noticed that some Goldspeed tyres are shown as 'Road Legal' in their Specification tab. Can you explain more?

A Goldspeed tyres are ECE-R75 and DOT approved for Road Legal use. They carry both certifcations clearly on each tyre's sidewall. The ECE-R75 approval is relevant for use in the UK. The ECE-R75 approval is an 'E' mark which consists of an 'E' followed by a number in a circle of 12mm diameter. This symbol is followed by a further number. The number outside the circle is the number of the type approval certificate issued for that particular tyre size/type. The 'E' certifies that the tyre complies with the dimensional, performance and marking requirements of ECE Regulation 75 (ECE-R75). The number shown with the letter 'E' in the circle is the code number of the country that processed the ECE-R75 type approval. UK approved tyres would be E11 for example and there is a different identifying number for each of the other countries involved. In the case of Goldspeed tyres; this is E4 due to their R&D and ECE Accreditation all being performed in Holland, as Goldspeed is the trademark of a Dutch company

Q How many miles can I expect from my Goldspeed Supermoto Road Tyres?

A There are many variables which have a bearing on tyre wear including; your own individual riding style, your body weight, the weight of your Supermoto, ambient temperatures, tyre pressures etc. These variables make it impossible to give an accurate guide although as a rule of thumb, you will generally achieve slightly less mileage than the OE tyres supplied on your Supermoto. However, as Goldspeed Tyres are a direct development from Goldspeed Competition Tyres, you should enjoy lots more grip together with progressive feel as a trade off!

Q What tyre pressure should I use with Goldspeed Supermoto Tyres?

A The Manufacturer's recommended cold pressures front and rear are 1.65 to 1.95 BAR or approx 24 to 28 PSI depending on conditions. These pressures should be adjusted to suit heavy bikes / riders, ambient temperatures, different track surfaces etc. but care should be taken not to over-inflate tyres as this may result in adverse effects e.g. speed weaves and / or premature wear. Pressures in excess of 30PSI are not recommended under any circumstances and will also be lower when used on Track Days and Competition due to a far more intense use / heat build up and consequent pressure increase

Q Why is the word "Goldspeed" or the "Goldspeed Logo" printed in different colours on different tyres?

A The colour of the word "Goldspeed" or the "Goldspeed Logo" is a simple indicator of the compound applicable to that specific tyre. The range of compounds is normally as follows:

Red: Ultra-Soft, Blue: Soft, Yellow: Medium, Silver: Street

Some compounds are only available on certain types of tyre, e.g. there is no Silver / Street compound available for Racing Slicks - for obvious reasons. Note that compounds also vary between tyres, so a Yellow / Medium slick may not be the same actual compound as a Yellow / Medium road tyre

Q How can I check rim size recommendations for a particular type of tyre?

A You can see each tyre's information within the Specification tab available on the detail view of each tyre. This includes rim sizes and other attributes for each tyre. If you are still unsure at this stage, please Contact Us We are more than happy to offer advice on tyre selection and their suitability for given rim sizes

Q I've read all this now, but I still can't decide which tyres to use... Any recommendations?

A Here's an old Supermoto Magazine International article about choosing the right tyres which might help

Q My local dealer says that he has lots of tyres which "... are just the same as Goldspeeds ...." should I buy these instead?

A Well it's a free country, but if it doesn't say 'Goldspeed' on the sidewall, then it isn't a Goldspeed tyre. So you decide

For those interested, here is the link to an article all about the CR500AF 'Black Diamond' pictured above

Chain Clearance Guide

Supermoto Tech | AAA Racing

One of the most frequent question that we get asked is "..will a Goldspeed 160/60 x 17 fit on my bike as I have a 150/60 x 17 on their at the moment and I can't see that there is the necessary extra clearance between the chain and tyre..." Or similar......

Well you'll be please to know that it's not an exact science and there's many variables unfortunately.......However, some facts to help you decide:

a) If a tyre size is given as 160/60 x 17, this does not mean that the width is exactly 160mm. Manufacturers are allowed a tolerance when sizing a tyre so a tyre could be anything from 156mm to 164mm say and still be marked as 160/60 x 17. The exact width varies dramatically between manufacturer and even, between type of tyre from the same manufacturer, so there are no golden rules here, just an awareness. This means that your existing 150/60 x 17 could possibly be the same width or even slightly narrower than its 160/60 x 17 replacement!

b) The rim that you fit the tyre to affects the profile of a given size tyre. For example, the profile of a 160/60 x 17 is markedly different on a 4.25" rim than say a 5" rim. This is why some tyres will be okay on a bike with one size rim, but not okay on the same size bike with a different rim

c) Chains move laterally for several reasons; they can be worn, incorrectly adjusted or, subject to resonance within the drivetrain at certain revs (if you want to see this in action - put your bike on a dyno; you'll be amazed at the movement of the chain). This is why a certain tyre is sometimes okay on rider A's bike but not on rider B's bike

To help you ensure that this problem doesn't affect your bike in advance, you can take several steps;

i) Contact Us and ask us have we had experience with this bike / tyre combination - we may have!

ii) Google the question on the internet; you'll find somebody in a forum who has asked the question before of riders on the same type of bike

iii) Make sure your chain is serviceable and correctly adjusted

Race bike owners tend to ignore any chain / tyre contact as it doesn't last long (!) but on on road bikes, you must consider both the aesthetics and the potential MOT Failure of older bikes. If you find you are having a problem and your tyre does show signs of contact with the chain, then there are several ways of curing this. The two methods we recommend are:

a) Have the rear wheel adjusted so that the rim is slightly off-centre in relation to the hub (birds eye view perspective). This will give you a small amount of extra clearance between the chain and tyre on the chain side of your rear wheel. Any competent wheel builder can do this for you quite quickly and cheaply, normally without removing the wheel from the bike. It's a measured process which involves adjusting the position of the rim by tightening and loosening spokes accordingly. If you have alloy / magnesium or carbon wheels - sorry this isn't going to work for you!

b) Use a lateral guide at the front of the swing arm. This is a belt and braces method and you can either make your own or buy a bling version from many aftermarket suppliers. The images below show such a guide made by MW Racing These are old pics now, but they are still useful as they show the guide fitted on a Honda CRF 450 Race Bike, with a 5" rear rim and a 165/56 x17 Goldspeed Race Pre-Cut Slick, before and after the chain is fitted

Supermoto Tech | AAA Racing

The guide is actually a modified Honda XR650 standard part, neatly and securely fastened to the swing arm

Supermoto Tech | AAA Racing