Hi all,
I need your help for sizing the chain on my bike. The RD is nuovo record on a 5 speed freewheel. It look too tight when I use the largest chainring, largest cog plus 2 links method. The chainring are 51-47. Can I or should I add another 2 links. I need your advices.
Thanks

thats the way i size chains, i've never needed to add any from that.

If the tension pulley (the lower one) on the rear derailleur can still be pulled forward with a light touch in the big-big combo, you've got enough links. That said, you're welcome to add links if you want, but stop short of letting the tension pulley swing higher than the jockey pulley when in the small-small combo.

Are you adding two complete links (four half-links) or two half-links?

Two half links. The reason I asked is that the old chain is much longer my sizing, about 4 half links. And also i see that the NR derailleur angle and swing curve make it tighter than other RD.

If you had decent chain tension in the small-small combo and everything worked properly with the old chain length, I'd follow that.