SSCX Only!

I have always used around 60" for single speed and 63" for fixed off road.
60" is great for uphills, single track etc,. but too low when fixed on the road sections.

Both are too low for longer road rides but if your 5 road miles are mostly up hlll then it may be less of a compromise and I would go for around 60". Too high and it takes the fun out of it when off road (unless you are racing sscx and ignore that as you will be going faster!)

39x20 atm but feels quite short for roads

Any reccomendations on a somewhat wider 32h rim designed for rim brakes?

Velocity A23? HPlus Son Archetype/TB14? Mavic A1/3/719?

Cheap as chip Mavic A119 also do the job well.

New tyres and brakes fitted. So much fun.

Looks really good fun, what are the tyres?

Deestone 35C, Taiwanese and cheap (£12 a pair).

So 42-18t could be a good balance - 63"?

I'd go for 42-21

Velocity A23? HPlus Son Archetype/TB14? Mavic A1/3/719?

Cheap as chip Mavic A119 also do the job well.

Thanks!

Deestone 35C, Taiwanese and cheap (£12 a pair).

Where?

Poland I'm afraid.

So 42-18t could be a good balance - 63"?

It will depend on what sort of off road you are doing. If fire roads, compacted gravel etc,. then 63 is great, if more technical single track or muddy then 63 is a slog.
63 would be a good start though I think.

more here: https://www.facebook.com/media/set/?set=a.10152592359164447.1073741842.113995139446&type=1

Running 38x20on my tricross singlecross . Perfect off road but a bit spinny on road . Gets the leg speed up tho .

Thats lovely that singular .

Woodpile porn

that singular is rly hot.

Looking for recommendations for a front chainring - Either 40 or 42T, 130 BCD, 5 Bolt?

Woodpile porn

Dunno, looks pretty ratty....

Looking for recommendations for a front chainring - Either 40 or 42T, 130 BCD, 5 Bolt?

if you want to futureproof your rig (1x10) get a wolf tooth from US.

Raceface now doing narrow-wide CX rings in 130bcd. Likely to be a heck of a lot cheaper than wolf tooth: http://www.bikerumor.com/2014/02/05/race-face-adds-narrowwide-cyclocross-chainrings/

You don't need a narrow wide for CX.

Thorn singles do the job. But any non profiled chainring will do with the appropriate chain retention. Which means a SRAM type 2 mtb mech. Shimano users will need additional chain retention until Shimano get their act together and produce a road compatible mech with a clutch in it.

How come not needed for CX? Tbh I'd be thankful of the extra retention (presuming clutch RD and no chain device). Even with a properly adjusted 47.5mm chainline in the top and bottom cassette sprockets chainline is far from ideal. Even more so with the wider ranger larger sprockets (36t).

apparently narrow/wide has proven to be bad in wet mud conditions too.