3ttt Record Stem limit?

Reply Subscribe

Thread Tools

Search this Thread

09-29-19 | 08:53 PM

Barry2

Thread Starter

“We don’t need no badges”

Joined: Sep 2019

Posts: 2,609

Likes: 1,630

From: SF Bay Area

Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)

3ttt Record Stem limit?

I have a 3ttt Record conical quill type stem on my Holdsworth and I’m wondering how far I can safely raise it?
Just how much must remain inside.
I was surprised there are no markings to indicate this limit.

TIA

Barry

09-29-19 | 09:01 PM

Soody

Senior Member

Joined: Mar 2015

Posts: 1,106

Likes: 518

From: New Zealand

Bikes: Gunnar, Concorde, Peugeot 753, Marin, Pete Tansley, Rocky Mtn, Worldrider, Francis Quinlan, Bob Jackson, Winora, Avanti, Klein, Quintana Roo, Shogun, Carlton, Emmelle, Specialized

maybe an inch above the split in the stem, or two inches of stem total, whichever is more?
don't suffer low bars, if you want/need higher, get a taller stem, you'll wonder why you didn't do it sooner

09-29-19 | 09:30 PM

repechage

Senior Member

Joined: Jun 2006

Posts: 21,861

Likes: 3,748

55 mm min insertion BUT reference the length of threading the steerer has- having the wedge or cone applying force in the threaded zone is not good practice.

09-30-19 | 09:44 AM

JohnDThompson

Old fart

Joined: Nov 2004

Posts: 26,402

Likes: 5,333

From: Appleton WI

Bikes: Several, mostly not name brands.

The rule of thumb is 2-1/2 times the diameter of the shaft. A 1" steer tube takes a 22.2mm stem so 22.2*2.5=55.5mm; [MENTION=57478]repechage[/MENTION]'s 55mm figure is acceptably close, given that it doesn't land in the threaded section, as he notes.