Deep Section Wheels

[The Saint]

Deep Section wheels these days come out in different depths of profile.

So what is the difference between riding let's say an 85mm profile and a 38mm profile?

Also why is it that some people ride with a 50mm profile on the front and an 85mm profile on the back?

When would you ride a 38mm profile, 50mm profile, 85 mm profile or mixed profile if you had all of them available to you?

[bob_the_builder]

 

Deep Section wheels these days come out in different depths of profile.

So what is the difference between riding let's say an 85mm profile and a 38mm profile?

Also why is it that some people ride with a 50mm profile on the front and an 85mm profile on the back?

When would you ride a 38mm profile' date=' 50mm profile, 85 mm profile or mixed profile if you had all of them available to you?

[/quote']

 

47mm...

 

Oh, and the third question, I ride 38mm wheels all the time.

 

[The Saint]

Bob Bob Bob - did you use a calculator?

[Dicky DQ]

He He!!!!

[bob_the_builder]

 

Bob Bob Bob - did you use a calculator?

 

Yes yes yes. (one for each bob...)

 

[ShortLegs]

82mm would be very twitchy in the slightest crosswind but offers the best aerodynamic advantage.

 

So most of the pros sponsored predominantly by ZIPP since they have the biggest variance in profile of wheel available are running 404s (58mm) in the front and 808's (82mm) in the rear.

 

I've run 808's in the front and back on track and they were awesome.

ShortLegs2008-04-25 05:50:33

[Dicky DQ]

82mm would be very twitchy in the slightest crosswind but offers the best aerodynamic advantage.

 

So most of the pros sponsored predominantly by ZIPP since they have the biggest variance in profile of wheel available are running 404s (58mm) in the front and 808's (82mm) in the rear.

 

I've run 808's in the front and back on track and they were awesome.

 

Hey Shorts, how did you get up onto the 808's????

[The Saint]

K what what sort of an advantage would you achieve running a 58 in the front and an 82 on the back as opposed to just runnin 2 x 58's

[Slowbee]

Bob Bob Bob - did you use a calculator?

Yes yes yes. (one for each bob...)

 

 85   85    85 

-38  -38   -38

 47   47    47 

 

 

yes  yes   yes

[The Saint]

You too married?

[Conti]

maybe one of the hubbers must do a test for us.

say a 100m sprint with different wheels.

would be interesting to see what time difference if any there is

[Slowbee]

maybe one of the hubbers must do a test for us.

say a 100m sprint with different wheels.

would be interesting to see what time difference if any there is

 

cannot be done ... statistically impossible

 

 

[Conti]

why?

[jmaccelari]

 

Deep Section wheels these days come out in different depths of profile.

So what is the difference between riding let's say an 85mm profile and a 38mm profile?

Also why is it that some people ride with a 50mm profile on the front and an 85mm profile on the back?

When would you ride a 38mm profile' date=' 50mm profile, 85 mm profile or mixed profile if you had all of them available to you?

[/quote']

85mm are more aerodynamic and reduce wind resistance over 38mm. A solid disk is

even more aerodynamic. The advantage depends on speed, so its no use using

a deep profile wheel at low speeds - the faster the better they are. At low speeds

the weight and rotational inertia of the deeper rims will outweigh any aero advantage.

 

When do you use them:

38mm: windy, hilly (typically lighter, and aerodynamics are not so important while

  climbing)

50mm: intermediate conditions

85mm: good wind conditions (little cross wind), flat and fast

 

In conditions with a cross wind, an 85mm on the back is OK, but the front will be

pulled around, making the bike twitchy. Using a lower profile on the front reduces

this effect as the "sail" effect of a lower profile wheel is lesser.

 

I have Zipp 303s and 404s and use them as described above. I don't mix them

because I haven't found any noticeable benefit from doing so.

 

Maybe I should try a 404 on the front and a 303 on the back for effect...

 

[Slowbee]

why?

true replication is impossible

[jmaccelari]

 

maybe one of the hubbers must do a test for us.

say a 100m sprint with different wheels.

would be interesting to see what time difference if any there is

 

cannot be done ... statistically impossible

 

 

The distance is too short and measurement errors would overshadow any

measured differences over such a short time.

 

The manufacturers talk of a minute or so's advantage over 100kms...