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You could do it without. Maybe need a chain catcher on the inside. But often it works without.
I am building something similar. 1x8 speed. But I opt for a used 104bcd square taper chainset instead. This made it possible to get narrow wide chainrings for less than 20gbp. I went for the on one, but ebay has other brands as well.I will ride mine offroad as well as city. If you won't do that, you can live without narrow wide I bet.
Hulsroy-
Thanks both.
Her usage is commuting and occasional mini touring; she is currently using SS so 1x8/9/10 would be plenty for her.Will this setup work?
Shifter: http://www.chainreactioncycles.com/shimano-tiagra-r400-8-speed-down-tube-shifter/rp-prod13671
Cranks: http://www.spacycles.co.uk/products.php?plid=m2b0s109p1698
Another option for cranks: http://www.evanscycles.com/products/shimano/fc-3550-sora-9-speed-compact-chainset-ec041355
RD: http://www.evanscycles.com/products/shimano/altus-m310-mega-range-7-8-speed-rear-derailleur-ec070096
Cassette: http://www.wiggle.co.uk/sram-pg850-8-speed-cassette/
Chain: http://www.rosebikes.co.uk/article/sram-pc-870-chain/aid:249793Any advantage to direct mount MTB rear derailleurs? The frame hasn't been built yet so can opt for PMW rocker option for those.
Can you get 104bcd in road Q factor? That and 165mm crank length is essential for her fit.
Next question disc wheels; not too boat anchor but not crazy expensive.
amey
perfect! I'll have to replace the chainring to narrow wide no?