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Old 09-08-2010, 09:49 PM   #1
Oz-Strom OP
Still trying
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Location: Brisbane Australia
Oddometer: 748
21" spoked front wheel on a F650GS?

Has anyone done this for improved dirt performance Also anyone fitted an 18" rear?

I did this on my Aprilia Pegaso Trail, and like the fact that I can swap the std road wheels for the dirt wheels with knobbies for when I go serious ADV riding. I am considering this bike as a replacement.

Thoughts and recommendations please?

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Old 09-09-2010, 02:54 AM   #2
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Location: On a RTW ride - currently Central Asia
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Marky did it, there is a thread with lots of pictures. The front from an F650 single (Dakar version has 21" front) will bolt in with the twin spacers, just flip it around to get the brake disc on the right side.

The 17" rear from an F800GS will bolt right in as well. You can also make a KTM 950/990 18" wheel fit, but it will require some custom spacers and an adapter plate for the brake disc. Not quite finished with mine yet, but it's from a 950 Super Enduro and has a super strong 2.5" wide Dirt Star rim.

Currently going RTW on a KTM 690 Rally, trip blog:

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Old 09-18-2010, 09:10 PM   #3
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Nicely done.

Good info. I'm thinking about doing this as well to my 2010 F650GS Twin. I'd like to hear more reports on it first before dropping the cash for it. Thanks for the post and keep them coming.
BMW F798GS 2010 (650 doesn't ring true)
Honda Deauville '02
Honda Trail 90 '84

I'll race my 650 against your 650!
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Old 04-26-2011, 12:51 AM   #4
Joined: Oct 2010
Location: Cape Town, South Africa
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Do you guys know if its possible to put 21'' dakar front rim on a f650 twin Cheers.
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Old 04-26-2011, 01:30 AM   #5
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Location: Brisbane-Australia
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Woody can now make one.

Be aware that RAD makes these hubs from Woody's initial suggestions and design. Under no circumstances would I ever buy them from RAD as they modified the bearing design from Woodys' specs and there have been 4 complete failures that I know of, we evaded failure by some diligent pre flight inspection and after much investigation Woody discovered RADs' un documented and badly executed alterations to his design.

Woody now gets the hubs from RAD and re specs them back to his original and much more robust design. If you want to see them in the flesh, PM me.

Hmm just noticed you wanted a 21", ours are standard size but I see no reason why Woody couldn't lace a 21" rim onto the hub. Then the only difficulty might be clearances.

Sal chickened out 3
Cheers, Mike
Don't just look at it - Ride the bloody thing!

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Old 04-26-2011, 10:13 AM   #6
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Location: Vancouver, BC, Canada
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I've used the f650gs single front wheel (it's a 19") and had woody build me a rear from a 800gs hub and Exel Takasago rim. I stayed with the same size as I'm vertically challenged but check out "A"'s thread. He started with the 650 twin and put a KTM front end on and i'm sure it's an 18" rear. Not 100% sure if the Dakar front will work but take a look at the schematics on BikeBandit and see if the 19" GS and 21" dakar have similar hubs and brake rotors.

I'd be a little concerned about putting a 21 on the front with the existing forks. there might be clearance issues with full fork compression.

I've done a few more mods since this photo... 2" rox risers. painted lower panels charcoal. removed front fender and added upper rear 650 single front fender. Tail tidy is next.


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Old 08-23-2013, 08:14 PM   #7
Joined: Apr 2012
Location: Burlingame, California
Oddometer: 1
Bought a second set of stock wheels

I bought a second set of wheels. Mounted K60 Heidenau tires with a 42 tooth sprocket on the rear.

I can change my wheels between dirt/adventure and road/wet in a couple of minutes. The cast wheels are not nearly as durable, but my F650GS Twin is used more for commuting than anything else.

If I do more dirt, I'll probably look for a lighter bike. For now I feel like I have everything I need on this bike.
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Old 08-24-2013, 08:22 AM   #8
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I have a stock 21 in the flea market.....

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Old 09-11-2013, 05:03 AM   #9
Juozaz F650gs
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21" spoked wheel with f800gs fork

One from most important things for f650gs.

Sorry friends, but how to import dirctly photos in this thread? Thank You, ebrabaek!
Juozaz F650GS Flame Red
Lithuania (ian)

Juozaz screwed with this post 09-11-2013 at 08:42 AM
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Old 09-11-2013, 06:26 AM   #10
Beastly Adventurer
Joined: Jan 2010
Location: Grand Valley, Colorado
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Originally Posted by Juozaz View Post

One from most important thinks for f650gs.

Sorry friends, but how to import dirctly photos in this thread?
It appears your google link above is restricted. You need to host the picture on a online website. I use It is free. Then you cross link it to this website. Takes a little to get used, but is fairly easy when you get started.

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