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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 04-25-11, 07:44 PM   #1
JSTNv
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Headset Issue

So apparently aheadset's zerostack headset didn't fit on my 727tr headtube . The thing looked like it fit , but it wasn't going down all the way . Here's the specs of the aheadsets's Zerostack Headset:
(link:http://www.aheadset.com/bicycle-headsets?p=ZS)
____________
size 1 1/8"
material Steel
race 30.0mm
cup 44.0mm
bearing 5/32 Ball
top stack height 10mm
bottom stack height 4.5mm

So to my understanding another website is stating that FSA's ZS3 headset is the only headset that will suite the 725/727tr frames. Here is it's specs:
(link:http://www.iminusd.bigcartel.com/pro...on-zs3-headset)
____________
TH brand 36/45 degree Micro Angular Contact Bearings (blue seal)
7075 aluminum crown race
Laser etched FSA aluminum top cap
Stack Height* - 9.8 + 3.3 = 13.1mm
Black anodized finish
Weight - 80 grams (1 1/8")

Now can anybody help me ? I just wanna start ridinggggg . Thanks !
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Old 04-25-11, 07:50 PM   #2
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You need a headset press to install a headset.....
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Old 04-25-11, 07:51 PM   #3
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The Aheadset ZS cups are too deep and will bottom out before becoming flush. You need to use an FSA ZS3 or something with shallower cups. Leader recommends that particular headset for a reason.

Besides, the Aheadset is junk.
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Old 04-25-11, 08:11 PM   #4
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yea. i have the FSA ZS3 on my 721 v2. and it looks goooooood too
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Old 04-25-11, 08:54 PM   #5
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do all headsets need a press ? i was able to pop on/off my roadie's one with ease . Is there anything similar to the specs on the FSA ZS3 ? (i need to save $$)
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Old 04-25-11, 09:10 PM   #6
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This is what I used >>> http://www.universalcycles.com/shopp...5&category=724 It may be a bit cheaper than the FSA.
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Old 04-25-11, 09:18 PM   #7
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i just got a leader 725 so this helps me out i was looking at this will it work




http://www.pricepoint.com/detail/189...p=205%20CACZS9
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Old 04-25-11, 09:27 PM   #8
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do all headsets need a press ? i was able to pop on/off my roadie's one with ease . Is there anything similar to the specs on the FSA ZS3 ? (i need to save $$)
Ideally... especially with sealed headsets in this case, where you risk ruining the bearings if using other unconventional means...
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Old 04-26-11, 12:38 AM   #9
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hmm my buddy is running the cane creek zs3 on his 725tr . thanks for that tejano .
anybody know if the 725/727tr have same headtube stack height ?
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Old 04-26-11, 12:44 AM   #10
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hmm my buddy is running the cane creek zs3 on his 725tr . thanks for that tejano .
anybody know if the 725/727tr have same headtube stack height ?
Stack height is by personal preference; although having it too high and slammed (virtually no stack, just stem) is looked down upon.

The 727 and 725 are siblings minus cosmetics.
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Old 04-26-11, 12:53 AM   #11
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oh well i meant to say where the 'internal bearing falls into' that depth is both the 725/727 have the same depth ?

minus cosmetics you said they are same geometry ?
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