42t chainring on the outside?

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

I don't know, but let me know how you get on. When I go on my yearly
bike holiday shortly I'm thinking of running a 42 on the outside of my
triple in a 42,39,30 combo. I'd say 42 would be plenty as I'm not really
interested in seeing what numbers I can pull going downhill when loaded.

MTB triples are nearly all 42/44 on the outside

SW

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

Quoted message said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

In article <[email hidden]>,

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

You can use both pinned/ramped and plain chainrings in the outermost
position. It's the pins and ramps of the larger chainring you're
shifting TO that are engaged by the chain, not those of the chainring
your shifting from; so shifting to a pinned and ramped outer chainring
will definitely be smoother than to a plain one.

There is a caveat though: better chainrings designed for the outermost
position have a stud meant to prevent the chain jamming against the
crank when the it derails to the outboard. Middle/inner chainrings lack
this feature.

Luke

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Non pinned/ramped chainrings work. Not as quickly, easily as
pinned/ramped. If you want a pinned/ramped 42 chainring, buy a TA
brand. Or buy a middle replacement chainring for a Shimano triple road
crankset. Shimano triple cranksets come with 52-42-30 rings. Get the
42 replacement ring and put it on your bike in the outer position.

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Sure, with a well adjusted front der or TA makes a 42t 'outer' with pin
and ramps and such.

Remember, once upon a time, on a cycle far, far away, big rings didn't
have pickup pins or ramps...even with 'STI'

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Road triple cranksets from Shimano come with 42 tooth middle
chainrings. These have ramps and pins to get the ring up from the
inner chainring. Just buy a replacement 42 tooth chainring for a
triple crankset and put it on the outside. Any shop that deals in
Shimano can get these.

A plain 42 ring without ramps and pins will also work, if not quite as
quickly.

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Either setup should work fine. There's so little difference between the
38 and the 42 or 44 that shifting will be unaffected.

On the other hand, you may better off just running a single 39 or 40
tooth chainring.

Jeff

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Ramped chainrings shift better, quicker than unramped chainrings. But
unramped/pinned still shift fine. You can use any 42 chainring. But
if you want ramps and pins on your outside 42 ring, they are very easy
to find too. Almost all good road triple cranksets come with 42 middle
rings. These all have ramps and pins to help get the chain from the
inner ring to the middle. So just buy a replacement 42 middle
chainring for a triple crankset and put it on the outside.

tspoon said:

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

I don't know, but let me know how you get on. When I go on my yearly
bike holiday shortly I'm thinking of running a 42 on the outside of my
triple in a 42,39,30 combo. I'd say 42 would be plenty as I'm not really
interested in seeing what numbers I can pull going downhill when loaded.

You'd be turning the chainring around to put it on the outside. If the
teeth are cut symmetrically from either way it should be OK. On my crank
set I'm not sure that this is the case though - the leading edge is a
slghtly different shape to the trailing edge.

On 8 Jan 2006 07:12:55 -0800, "Qui si parla Campagnolo" <[email hidden]>

Quoted message said:

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Sure, with a well adjusted front der or TA makes a 42t 'outer' with pin
and ramps and such.

Remember, once upon a time, on a cycle far, far away, big rings didn't
have pickup pins or ramps...even with 'STI'

And holy moley STI (or Ergo) will shift a ring without pins and ramps.

Ron

RonSonic said:

On 8 Jan 2006 07:12:55 -0800, "Qui si parla Campagnolo" <[email hidden]>

Quoted message said:

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Thanks,
Erik

Sure, with a well adjusted front der or TA makes a 42t 'outer' with pin
and ramps and such.

Remember, once upon a time, on a cycle far, far away, big rings didn't
have pickup pins or ramps...even with 'STI'

And holy moley STI (or Ergo) will shift a ring without pins and ramps.

Ron

Yep. Just not as quickly.

erikv said:

I'd like to run a 38/42 or possibly a 38/44 setup on my cyclocross bike
(DA 9spd drivetrain).

All the 42t chainrings I see are inner chainrings. Will they work on
the outside? Or should I try an unramped 3/32 chainring instead?

Both will work fine. I have two bikes set up in a similar manner,
although they have 110 bcd chainrings. One is a 34-42 double and the
other is a 26-36-44 triple. The double has a ramped 42t chainring, the
triple has flat rings. The difference in chainring size is small
enough that the ramps make no practical difference. The difference in
your setup is even less.

Tom