The RAM has been designed around 27.5x3.0" (aka 27.5+) tyres.  If you want the following out of your cycling then the 27.5+ tyre build is the correct choice for you.

27.5+ (or 650B plus) is 3.0 inches wide and is about the same external diametre as a 29x2.3" tyre.  However they offer the following advantages:

Grip while climbing and Control while descending.

Lower tyre pressures (less punctures)

Roll over everything

55mm Rim option for complete control

38mm Rim option for lighter and making the tyre slightly narrower.

EACH FRAME HAS THE FOLLOWING SPECIFICATION:

142 MAXLE REAR END to suit singlespeed hubs.
30.9mm dropper post,
SHIS 44 headtube
27.5+ but will also fit 29 inch wheels. 

General Notes:

We require a purchase commitment, before ordering materials.  

We like you to ride our bikes first so we will send one to you for a trail before processing your order and to ensure you are happy.

EACH MONOCOQUE FRAME CAN BE TAYLORED TO YOU AND YOUR GEOMETRY REQUIREMENTS.  EVERYTHING GETS YOUR APPROVAL BEFORE THE MATERIAL GETS ORDERED ON OUR SUPPLIERS.

Olsen Bicycles lay up each frame to the customers weight and specification.  The REACH (top tube) geometry can be changed from 66-68 degree headangle to suit 120mm travel or rigid forks.

The SWAN has been designed around 29x2.4" tyres.  If you want the following out of your cycling then the 29 inch tyre build is the correct choice for you.  

Loads of mud clearance.

Fast with low rolling resistance.

Light rotational weight

Tubeless compatible wheels

EACH FRAME HAS THE FOLLOWING SPECIFICATION:

142 MAXLE REAR END to suit singlespeed hubs.
30.9mm dropper post,
SHIS 44 headtube
29 inch wheels but will fit upto 27.5x3.0" tyres

General Notes:

We require a purchase commitment, before ordering materials.  

We like you to ride our bikes first so we will send one to you for a trail before processing your order and to ensure you are happy.

EACH MONOCOQUE FRAME CAN BE TAYLORED TO YOU AND YOUR GEOMETRY REQUIREMENTS.  EVERYTHING GETS YOUR APPROVAL BEFORE THE MATERIAL GETS ORDERED ON OUR SUPPLIERS.

Olsen Bicycles lay up each frame to the customers weight and specification.  The REACH (top tube) geometry can be changed from 66-68 degree head angle to suit 120mm travel or rigid forks.

EACH FRAME HAS THE FOLLOWING SPECIFICATION:

142 MAXLE REAR END to suit singlespeed hubs.
30.9mm dropper post,
SHIS 44 headtube
27.5+ OR 29 inch wheels. 

The LAMB frame benefits from being designed for the demands of belt-drive singlespeeding, but has the versatility to be converted for derailleur gears.  Singlespeed has a less static riding position and therefore creates a higher load demands on a frame.  Out of the saddle climbing and wrestling with the handlebars all put side load on the head tube and down tube. 
The lattice down tube is an integral part of the frame's structure, reducing lateral bottom bracket pedaling flex, yet keeping some comfort.
The LAMB uses modern mar-aged and austenitic stainless steels or "Super Steels" from Reynolds (953) and Columbus (XCR).  With the extra thin walls that can be achieved, these steels are extremely hard to work with and weld.  

The LAMB Olsen Bicycles use LASER cut tubes to create modern over-sized lugs to incorporate modern bicycle design features.  

Adjustable Beltdrive Dropouts
Optimised chainstays
Lattice space frame down tube
Pressfit BB92 bottom bracket
31.6mm dropper post
Tapered headtube
26, 27.5 or 29 inch wheels