This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Help me understand gear ratios

Joined Aug 2010
10 Posts | 0+
Ok - another newbie question.

The 08 450 FE I bought has a 48 tooth rear sproket and either a 14 or 15 tooth on the front (I can't remember, and I'm traveling on business so I can't go count them just now).

I asked the seller why he swapped the back sprocket and he said he didn't really remember what he was after when he did it.

If I look at either a 14:48 or 15:48 it seems both of those are sort of middle of the road gearings - not really optimized for top speed or accelleration (although the 15 front should produce a higher top speed than the 14 right?).

In any case, these numbers by themselves lack context to me.

What I'm trying to sort out is for someone (me) who's going to ride 70% of the time on the wooded / hilly trails, 25% on more flat offroad terrain (plains / desert) and maybe 5% on the road (basically in areas where I need to get from one riding area to another) - what gearing ratio should I be looking at?

Thanks for taking the time to provide input.

Regards,
Mike
 
Mike

The 08 FE450 was supplied (in the UK) with two sets of gears. The main set is 14/48 and I would say is ideal for what you plan to do. With that gearing, the bike was easily capable of going faster on the road than I felt comfortable with, as the tyres got quite lively about about 70mph. At the other end of the scale, those ratios also coped well with near vertical goat tracks!

However, from the showroom, the bike had 15/42 gearing - perfect for the EU 'drive by' noise test etc. My barely used 15/42 sprockets will be on eBay any day now...!

Greg
 
basically 1 front sprocket tooth is worth around 3.5 of the rear. I would gear the bike for the trails and just slow my speeds on the road. the ideal trail gearing IMHO is 13/48. i use 14/51 and this saves the rubber SA protector on the front of the swing arm.

the simple rule is to divide the little number into the big one to get the ratios etc. so 13/52=4 and 15/45=3 and then you have anything in between but the simple rule is that it's about three and a half to one.

the correct trail gearing sees the bike fall into a corner as you decelerate for a corner. too short and you fall inside the corner, pick it up and then have another go. too long an that berm you aimed for sees you ploughing on straight into the woods and beyond because you haven't enough engine braking.

regards

Taffy
 

Register CTA

Register on Husaberg Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Recent Discussions