Boardman 8.9 adv gravel -size up or down?

[Rock bus]

I’m looking at getting a boardman 8.9 adr gravel bike.
At 5ft 10 I shoukd be looking at medium size But bit confused as frame is only c54 and my road bike is a 56.

I’ve tried a large and it does feel a stretch but “doable’ but this just might because thar one is for sale at decent price?

Anyone have this bike and can advise or any general advice on whether should size up or down for a gravel bike?

 

[vickster]

I’m looking at getting a boardman 8.9 adr gravel bike.
At 5ft 10 I shoukd be looking at medium size But bit confused as frame is only c54 and my road bike is a 56.

I’ve tried a large and it does feel a stretch but “doable’ but this just might because thar one is for sale at decent price?

Anyone have this bike and can advise or any general advice on whether should size up or down for a gravel bike?

Check the geometry charts, Boardman usually use the seat tube measurement for the sizing rather than top tube as per many other brands (and probably your 56. So the 54 may well have a 56 TT.

The medium has a 55.5cm TT, you can always add a slightly longer stem if needed (scroll down for geometry)
https://www.boardmanbikes.com/gb_en/products/2332-adv-8.9-2021.html

 

[fraz101]

I’m 5’9” and had this bike previously in size M 54” which fitted perfect for me

I have also just bought a Boardman SLR 9.2 in M which also fits perfectly

 

[Milzy]

Down.

 

[Seevio]

Unless OP or I are freakishly disproportionate, the M size is right.

 

[Milzy]

Yeah 5’ 9” is fine M but as a general rule when in between go down.

 

[Peter Salt]

If in between sizes always go down. Main reason is that it's easier to adjust a smaller frame to a larger rider than other way round.

 

[currystomper]

I'm 6foot and just got a 2nd hand large. I've got a couple of inches on the seat post (see https://www.cyclechat.net/threads/putting-the-bite-into-a-boardman-adv-8-8.286431/post-6770982) but I would suggest if you can't try it out go for a medium as suggested above

 

[Jet73]

I’m looking at getting a boardman 8.9 adr gravel bike.
At 5ft 10 I shoukd be looking at medium size But bit confused as frame is only c54 and my road bike is a 56.

I’ve tried a large and it does feel a stretch but “doable’ but this just might because thar one is for sale at decent price?

Anyone have this bike and can advise or any general advice on whether should size up or down for a gravel bike?

I have one adv 8.9 electric go for mudim size

 

[Jameshow]

Boardman historically tended to be 53, 55, 57.

55 being medium which I think would suit you best.