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PostPosted: Sat Jan 06, 2018 3:18 am 
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Joined: Wed Jan 03, 2018 7:09 pm
Posts: 35
Hi, there.

Now im plannig to buy zipp303 V3, soI borrowed that wheel from colleague and installed wheel to my bike.(dogma651)

As you see on the picture, clearance between frame and zipp303 is pretty narrow-almost 3mm- because wheel clearance of my frame(dogma651) is not much wide.

After installation I rode my bike very short time for test-maximum power was under 400watts- and no any problem has occur.

Does any problem is happen if I ride in this status?

How much clearance between wheel and frame is needed as minimum?


Last edited by Chans1ee on Sat Jan 06, 2018 3:32 am, edited 1 time in total.

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PostPosted: Sat Jan 06, 2018 3:25 am 
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Posts: 35
↑ Pictures of clearence between wheel and framset.
Dogma651-zipp303


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Posted: Sat Jan 06, 2018 3:25 am 


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PostPosted: Sat Jan 06, 2018 7:51 am 
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Joined: Mon Aug 29, 2016 11:19 am
Posts: 443
Had it been most other wheels I'd probably advise against it but a good condition zipp wheel is probably a good candidate for the job. Keep in mind though that no wheel is completely maintenance free. It only takes one mistake to damage the paintjob. How important is it to you?

I'd say it's ok but it depends on the stiffness of the wheel and the play in your hub and axle. (trueness and dish needs to be very accurate)

A simple test is to put a thumb on the rim and put some pressure sideways. If you can without too much effort get the rim/tire to rub the frame/calipers/brakepads, you need to change something. The weight and power of a rider stresses the wheel sideways a lot.

Because of how a rear wheel is designed, it's less stiff one way than the other. So a centered wheel might not be optimal in this situation.

/a

(I'm not a professional wheelbuilder. Just an amateur :lol:.)


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PostPosted: Sat Jan 06, 2018 9:27 am 
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Joined: Sat Dec 17, 2016 7:28 pm
Posts: 140
I have read minimal clearance should be at least 4mm. Hard to judge milimetres from photos as it can be optical illusion.. you may have problems with play in wheels and when you catch some dirt..


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PostPosted: Sat Jan 06, 2018 10:41 am 
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hannawald wrote:
I have read minimal clearance should be at least 4mm. Hard to judge milimetres from photos as it can be optical illusion.. you may have problems with play in wheels and when you catch some dirt..
Today i checked clearance between wheel and chainstay by ruler and it was 3mm.
That was pretty tight but other dogma651+303 user says It is not big problem, but using 303 with 25C tire makes interference.


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PostPosted: Sat Jan 06, 2018 10:50 am 
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Posts: 35
alcatraz wrote:
Had it been most other wheels I'd probably advise against it but a good condition zipp wheel is probably a good candidate for the job. Keep in mind though that no wheel is completely maintenance free. It only takes one mistake to damage the paintjob. How important is it to you?

I'd say it's ok but it depends on the stiffness of the wheel and the play in your hub and axle. (trueness and dish needs to be very accurate)

A simple test is to put a thumb on the rim and put some pressure sideways. If you can without too much effort get the rim/tire to rub the frame/calipers/brakepads, you need to change something. The weight and power of a rider stresses the wheel sideways a lot.

Because of how a rear wheel is designed, it's less stiff one way than the other. So a centered wheel might not be optimal in this situation.

/a

(I'm not a professional wheelbuilder. Just an amateur :lol:.)
Thanks to your kind reply.
According to your opinion, I put some pressure to side of rim. I dont know 'some pressure' is how much, but considerable pressure(almost 7~8kgf) has needed to contact between rim and frame.


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PostPosted: Sat Jan 06, 2018 12:25 pm 
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Location: Atlanta, GA, US
I think the industry standard is 5 mm. Personally, I am OK with as little as 3 mm as long as I know the tire is not rubbing under power.

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PostPosted: Sat Jan 06, 2018 1:51 pm 
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Chans1ee wrote:
Thanks to your kind reply.
According to your opinion, I put some pressure to side of rim. I dont know 'some pressure' is how much, but considerable pressure(almost 7~8kgf) has needed to contact between rim and frame.
A believe a good rule of thumb is to use your brake pads as a guideline.

Do you get brake rub at a similar or slightly smaller distance?

If your answer is definitely no then I don't see why the wheel should touch. Assuming you don't pick up too much dirt to fill up the gaps.

Pay attention to your skewer tension and that the wheel is always seated properly in the dropouts to ensure it's not rubbing from a simple accidental misalignment.

/a


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PostPosted: Sat Jan 06, 2018 2:44 pm 
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Posts: 751
I had tight clearance between tire and inside chainstays on my Dogma 65.1 when running 25mm tires on 17c internal diameter rims. I placed black electrical tape to protect the paint and to gauge the amount of rub. After a while I checked the tape and there was very minimal to no tire rub evidence on the tape. Definitely did not rub through the tape into paint finish. Also make sure to trim the rubber nibs (hair) if it is a new tire as these tend to “polish” the inside chainstays.


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Posted: Sat Jan 06, 2018 2:44 pm 


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PostPosted: Sat Jan 06, 2018 3:58 pm 
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Location: Cambridge UK
The problem with tyres (such as Conti), is that they actually measure a lot wider on some rims .... therefore, buy a 23 if you want it 25 wide

I'm happy with 25 wide and don't see a need for 28's (I use tubeless) .... I prefer having the tyre width the same as the rim width (I use HED Belgium Plus rims)

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