Difference between R600 and A550 LR Brakes?

MykalCrooks said:

What is actual difference between Shimano R600 ("Ultegra" grade) and Shimano
A-550 ("Tiagra/105" grade) long reach calipers? I can see the pads are
different, but does anybody know of differences in metallurgy or design of
bearings or bushings?

mC

pads and barrell adjusters...innards are the same-no bearings all
bushing.

Qui si parla Campagnolo said:

pads and barrell adjusters...innards are the same-no bearings all
bushing.

The R600 has one ball bearing.

--
MfG/Best regards
helmut springer

Helmut Springer said:

The R600 has one ball bearing.

That the Armstrong model?

(Sorry.)

"Helmut Springer" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Qui si parla Campagnolo said:

pads and barrell adjusters...innards are the same-no bearings all
bushing.

The R600 has one ball bearing.

--
MfG/Best regards
helmut springer

Did find a ball bearing -- a bushing embedded with 12 tiny balls -- in the
center pivot for the R600. Wondered if the less expensive brake has a
similar bushing/bearing. The action of the R600 feels very smooth compared
to plain-busing Tektro LR brake I have. Found exploded diagram of current
105 calipers and they appear to have this same kind of bearing that is found
in current Ultegra. But can't tell from available information if the A550
Tiagra grade brake has same bearing system as the R600

-mC

MykalCrooks said:

But can't tell from available information if the A550 Tiagra grade
brake has same bearing system as the R600

I have RX100 short reach brakes here, that is BR-A550, and they use
only bushings. Still smooth.

--
MfG/Best regards
helmut springer

Bill Sornson said:

Helmut Springer said:

The R600 has one ball bearing.

That the Armstrong model?

Nope, it's not doped.

Quoted message said:

(Sorry.)

Dito.

--
MfG/Best regards
helmut springer