300 EC Supermoto conversion informations

[Antoine]

Hi guys !

I am getting back on the project.

Could someone provide me some dimensions please ?
I would need (for a 300EC between 2007 and 2010) :

- Axle diameters (front and rear). I think it's 20mm, if you could confirm that
- Hubs widths (from one bearing to another - outer side of the bearing)

Thanks !

Antoine

[Anders]

The front axle is 25mm, the rear one is 20. The rest I can give you in a couple of days. I am not at home at the moment, will return home tomorrow night.

Also remember that the distance between the sprocket and brake disk mounting surfaces on the rear hub is important.

Sent fra min E5603 via Tapatalk

[Antoine]

Originally Posted by Anders

The front axle is 25mm, the rear one is 20. The rest I can give you in a couple of days. I am not at home at the moment, will return home tomorrow night.

Also remember that the distance between the sprocket and brake disk mounting surfaces on the rear hub is important.

Sent fra min E5603 via Tapatalk

25mm for the front ! Did not expected that Is it on your 2006 or 2015 EC200 ?
Thanks a lot.

Guys, do not hesitate to give me some other feedbacks on other Gasgas years

[Anders]

Originally Posted by Antoine

25mm for the front ! Did not expected that Is it on your 2006 or 2015 EC200 ?
Thanks a lot.

Guys, do not hesitate to give me some other feedbacks on other Gasgas years

It is 25mm on both 06 and 15. I think the 25mm axle was introduced around 02-03.
But don't panic (yet). There are some really low profile ball bearings out there, in case you start out with e.g. a japanese hub intended for 20mm.

Sent fra min E5603 via Tapatalk

[Anders]

Some measurements from my wheels. 06 and 15 wheels are interchangeable.
These measurements are taken with my caliper (fully analog) in a cold and dark(ish) shed, and may be a mm or two off in any direction. But I hope it is good enough for your needs just now. If you need 100% accuracy, I can try to do it better :-)

Front:
hub width is 100 mm. The brake disk is "outside" the hub, so the total width including the brake disk is a few mm more than 100. I didn't measure the width including spacers, but when you remove the spacers, the distance from bearing outside to bearing outside is approx. 83mm.

Rear:
total width including spacers: 170mm
hub width: 155mm
I didn't measure the width over just the bearings (as I did on the front), but I presume its around 140-145.
distance between inside of sprocket to inside of brake disk: 150

As I said earlier, the front is pretty easy to adapt. As long as you are willing to accept a few mm offset from the bike's center line it will be plug and play (with a new pair of distances). If needed, some sideways adjustment can be done by loosening spokes on one side and tightening on the other.

The challenge with the rear is that you need a hub where it's easy to get the correct distance between the sprocket and the brake disk by shimming either disk or sprocket out (the best is of course to find a hub with the same distance). It's starting to get nasty if you have a hub where the distance is too big in the first place. At the same time you'd like to get a hub that that places the rim close to the center of the bike.

[Antoine]

Originally Posted by Anders

It is 25mm on both 06 and 15. I think the 25mm axle was introduced around 02-03.
But don't panic (yet). There are some really low profile ball bearings out there, in case you start out with e.g. a japanese hub intended for 20mm.

Sent fra min E5603 via Tapatalk

Good to know, thanks.

Originally Posted by Anders

Some measurements from my wheels. 06 and 15 wheels are interchangeable.
These measurements are taken with my caliper (fully analog) in a cold and dark(ish) shed, and may be a mm or two off in any direction. But I hope it is good enough for your needs just now. If you need 100% accuracy, I can try to do it better :-)

Front:
hub width is 100 mm. The brake disk is "outside" the hub, so the total width including the brake disk is a few mm more than 100. I didn't measure the width including spacers, but when you remove the spacers, the distance from bearing outside to bearing outside is approx. 83mm.

Rear:
total width including spacers: 170mm
hub width: 155mm
I didn't measure the width over just the bearings (as I did on the front), but I presume its around 140-145.
distance between inside of sprocket to inside of brake disk: 150

As I said earlier, the front is pretty easy to adapt. As long as you are willing to accept a few mm offset from the bike's center line it will be plug and play (with a new pair of distances). If needed, some sideways adjustment can be done by loosening spokes on one side and tightening on the other.

The challenge with the rear is that you need a hub where it's easy to get the correct distance between the sprocket and the brake disk by shimming either disk or sprocket out (the best is of course to find a hub with the same distance). It's starting to get nasty if you have a hub where the distance is too big in the first place. At the same time you'd like to get a hub that that places the rim close to the center of the bike.

Thanks a lot for your huge help
I'll get back to you if necessary and will let you know about the news !

Antoine

[mrfreezer]

My girlfriend has Husky SM 125 2002 and as I have measured all dimensions of hubs are te same as on my GG EC 250 2008.. Will try to fit those wheels on my gasser and will post pictures..

[Antoine]

Originally Posted by mrfreezer

My girlfriend has Husky SM 125 2002 and as I have measured all dimensions of hubs are te same as on my GG EC 250 2008.. Will try to fit those wheels on my gasser and will post pictures..

I remember someone saying here that the Husky rims may fit on the gasser without mods, so he was right ! Are the axles 25mm front and 20mm rear ? Thanks for the info
That is so cool to have a girlfriend who rides a 2 stroke SM

[MargusV]

Pre-KTM Husqvarnas have rims compatible with GasGas.

[Antoine]

Originally Posted by MargusV

Pre-KTM Husqvarnas have rims compatible with GasGas.

That's good to know. Usually those sets are cheaper than GG ones.

Merry Christmas to all of you !!
Finally found a set of Supermoto wheels that belonged to a Gasgas 450 FSE.
Almost brand new with the brembo caliper and the original offset bracket



I'll keep you updated when the project moves forward.
Thanks to all of you for your tips and helpful advices.