Custom carbon frame - which bottom bracket?

Discuss light weight issues concerning road bikes & parts.
jever98
Posts: 809
Joined: Wed Feb 18, 2009 12:02 pm

by jever98

hambini wrote:Hi,

For BB30, I can't make a bb30 bottom bracket. I've seen some people that make them one piece but they have frigged the bearings and will compromise life.

For PF30 to fit a BB30 crankset, that is doable but there is a general trend now towards BB30 (90mm) cranks. so they aren't 68mm anymore. So I can make them as a special but I don't keep them as a stock item.

Hope that helps

Hambini


Awesome! I will contact you for a PF30 black series. Do you know the weight off hand?
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No longer in the industry

MyM3Coupe
Posts: 117
Joined: Thu Nov 24, 2016 10:32 pm

by MyM3Coupe

hambini wrote: Cannondale, Boardman and Cervelo all take the mick with their tolerances. Look and Time are at the other end of the spectrum.

You bring up a good point; BB30 isn't good for super mass produced frames. My Time Izon has been flawless for two years and many miles, as the BB30 bracket is perfectly machined. I'm also using Hawk Racing bearings which are brilliant.

by Weenie


audiophilitis
Posts: 509
Joined: Sun Jul 29, 2012 12:49 am

by audiophilitis

With tight tolerances, the BB30 will probably offer a wider range of crank options.

Nefarious86
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by Nefarious86

T47 for futre proofing
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alcatraz
Posts: 722
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Bb30 is lightest and if it creaks I hear you can either use gap filler or special oversized bearings.

Although for your weight I might vote for BSA. Zero creak.

/a

hambini
Posts: 121
Joined: Tue Nov 15, 2016 8:13 am

by hambini

jever98 wrote:
hambini wrote:Hi,

For BB30, I can't make a bb30 bottom bracket. I've seen some people that make them one piece but they have frigged the bearings and will compromise life.

For PF30 to fit a BB30 crankset, that is doable but there is a general trend now towards BB30 (90mm) cranks. so they aren't 68mm anymore. So I can make them as a special but I don't keep them as a stock item.

Hope that helps

Hambini


Awesome! I will contact you for a PF30 black series. Do you know the weight off hand?


about 140g

NiFTY
Posts: 1061
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

I have 3 essentially pf30 frames - tarmac sl3 (osbb), slice rs and evo. Every time i thought i had a bb creak it was something else (cassette lockring, hollowgram lockring, pedal threads). I have pressed each bb myself with a cheap press from chain reaction. I grease the cups. Never a creak. A sram pf30 with the center plastic sleeve dremeled out ehich is not required unless di2 wires are running past is 69 grams.
Evo 5.02kg SL3 6.77 Slice RS 8.89 viewtopic.php?f=10&t=110579" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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mortirolo
Posts: 71
Joined: Mon Oct 24, 2016 10:08 am
Location: EU

by mortirolo

I vote T47.
My AX lightness composite integrated BB386EVO is a light and nice solution, but has limited crank compatibility.
Marco Pantani - Momenti Di Gloria

pdlpsher1
Posts: 1410
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

I'm getting a custom frame (Ti not carbon) and I picked T47. I like the Chris King BB so I can use their grease injection tool. The BB should be the last thing I worry about when I ride.

I plan to use the Quarq DZero BB30 powermeter.

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