any difference between the D402 and the D404 Harley Wheels & Harley Tire Issues Discuss any difference between the D402 and the D404 in the Harley Tech & Harley How-to forums; Does anyone know if there is any difference between the D402 and the D404 other that the 404 don't say Harley, and the price?...

[HarleyCruiser]

Does anyone know if there is any difference between the D402 and the D404 other that the 404 don't say Harley, and the price?

[Tbone]

Good luck. I've had similar questions about two other Dunlop tires. I asked the dealership and they hadn't a clue. I contacted Dunlop and they sent me a brochure describing the different models of tires. Stuff I had already read on the internet. Still no concrete answer.

Maybe we can get Buzz to get a list of questions about Dunlop tires and swing some weight with the magazine to get an interview with a Dunlop R&D engineer to answer some of them.

1. My '06 Lowrider came with a Dunlop 17" K591 on the rear and a Dunlop 19" D401 on the front. A Dunlop 19" K591 is available. Why wasn't the 19" K591 on the front matching the 17" K591 on the rear? Is there a reason to not use the 19" K591 on the front to match the rear? It is the same specs except for the speed rating.

[Tbone]

Copied from Dunlop website:

The D402 is built with a three-ply polyester casing with two fiberglass belts, and offers greater load-carrying capacity and stability. It is the only tire approved by Harley-Davidson for its touring bikes.
The D402 is the approved Harley-Davidson touring tire.
Built with a three-ply polyester casing with two fiberglass belts, the D402 offers great load-carrying capacity and stability.
Computer-optimized tread profile with offset center groove improves rider confidence over rain grooves and steel-grated bridges, while reducing cupping for even wear.
The D402 is available in front and rear black, single-white-bar and wide-white sidewall, all with an H speed rating.
Wider MU85B16 is load rated up to 908 pounds.
This tire is co-branded with the Harley-Davidson name and logo on the sidewall.

The D401 features an advanced tread pattern and specifically formulated compound to deliver outstanding grip in wet or dry weather, while delivering long tire life. It is the only tire approved by Harley-Davidson for its cruiser models.

• The D401 is the approved Harley-Davidson cruiser tire.
• An advanced tread pattern and specifically formulated compound deliver outstanding grip in wet or dry weather and provide long tire life.
• All D401 tires use bias or bias-belted construction and incorporate a computer-optimized tread profile to reduce cupping for even wear.
• Available in 90/90-19 and 100/90-19 front sizes and 130/90B16 and 150/80B16 rear sizes.
• This tire is co-branded with the Harley-Davidson name and logo on the sidewall.

Originally designed for racing but now incorporating refinements to meet the demands of sport and sport-touring riders, the K591 is the only tire approved for Harley-Davidson sport models and carries a V speed rating.
The K591 is the approved Harley-Davidson sport tire.
Originally designed for racing but now incorporating refinements to meet the demands of sport and sport-touring riders, the K591 is approved by Harley-Davidson for its sport models and carries a V speed rating.
The K591 delivers optimum grip in wet or dry weather for confident cornering.
The Dunlop® Harley-Davidson® Tire Series K591 is available in 100/90-19 front and three different 16- and 17-inch rear tires, all with black sidewalls.
This tire is co-branded with the Harley-Davidson name and logo on the sidewall.

[HogMan87]

Good information Tbone..well done.

[Tbone]

Sorry for the Hijack. I'm bad about that. Here's some information on the D402 and D404.

Make: Harley-Davidson | Model: FLSTF / I (90-03) - Fat Boy
Front Rim Size: 3.00x16 | Rear Rim Size: 3.00x16
Make: Harley-Davidson | Model: FLSTF / I (04-06) - Fat Boy
Front Rim Size: 3.00x16 | Rear Rim Size: 3.00x16


D404
Front
150/80-16 71H BW 32KY-91 3.50 25.43 6.02 6/32 761 @ 41
Rear
150/80-16 71H BW 32NK-80 3.50 25.35 5.81 9/32 761 @ 41

D402
Front
MT90B16* 72H BW 3020-91 3.00 25.30 5.20 5/32 783 @ 40
Rear
MT90B16 74H BW 3017-91 3.00 25.70 5.20 9/32 827 @ 40

It looks like the rim width is different between the 404 at 3.5" and the 402 at 3.0". The load is greater with the 402 which may be a requirement for HD touring bikes at the weight they carry.

I think the D402 is more of a fit than just the HD name on the side.

[HarleyCruiser]

T-bone/Mike thanks for getting back, just a little info that I have gathered.
I believe the 401 and the 402 are the same tire, HD on the 402.
I have run the 401 before, did not see any difference.
The 404 is an economy tire, not recommended for touring bikes.
I have read good and bad reviews, just like the 402 usually get.
The MT90B16 is a 130 tire same as on my bike. So it should fit ok.
I can pick up a 404 on e-bay for eighty bucks free shipping so I am going to try one.
I usually get about 11k out of a rear tire, I am pretty tame in my riding style.
If business gets any worse, maybe I will try the ****n Funks next.

[PhatBoi]

I know this posting is pretty old but it has interested me in that I recently purchased a set of Dunlop D404 tires for my 2004 Softail. I have about 5000 miles on them now and I can already tell they will not get the mileage the D402 tires got. I also noticed a slight lateral wobble when accelerating out of a turn. I am not an aggressive rider and my max speed is usually no more than 65 mph. I just like to cruise and enjoy the ride.
I did get a little over 15,000 miles out of the original D402’s. Looks as if I will be lucky to get 10,000 miles out of the D404’s.
I can say that if I had done a little more research into this topic I would not have purchased the D404’s as I am very anal when it comes to tires and brakes; Car or motorcycle.

Hope this helps.

[HarleyCruiser]

Yea already wore out that set, only got about six thousand out of them. Usually get eleven. Yea they were cheap but not cost effective, dollar per mile they were about the same as the 402’s and if I had to pay for changing them would have been more expensive.
Live and learn.
Got a great deal on a set of 402 through Dennis Kirk, both front and rear for $214. went on line and then called, saved thirty bucks by calling asking for the best deal.

Originally Posted by PhatBoi

I know this posting is pretty old but it has interested me in that I recently purchased a set of Dunlop D404 tires for my 2004 Softail. I have about 5000 miles on them now and I can already tell they will not get the mileage the D402 tires got. I also noticed a slight lateral wobble when accelerating out of a turn. I am not an aggressive rider and my max speed is usually no more than 65 mph. I just like to cruise and enjoy the ride.
I did get a little over 15,000 miles out of the original D402’s. Looks as if I will be lucky to get 10,000 miles out of the D404’s.
I can say that if I had done a little more research into this topic I would not have purchased the D404’s as I am very anal when it comes to tires and brakes; Car or motorcycle.

Hope this helps.