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Product Image BORG31 all weather aero wheelset 2:1 wheelset - rim brake front and rear

BORG31 all weather aero wheelset 2:1 wheelset - rim brake front and rear


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The BORG31 rim brake wheelset uses an alloy rim that tubeless ready (tape, valves and tubeless tyre lever supplied) 31mm deep and 24mm wide. Its a stiff rim. The wheelset has 20 spokes for the front wheel and 24 for the rear but the rear wheel is laced in a 2:1 pattern. Tubed tyres can of course be used.

If LLU bearings are wanted please purchase these separately and i will fit them. The hubs currently have LLB  bearings only and customers who buy bearings prefer them boxed....


  • 31mm deep 24mm wide tubeless ready wheelset
  • 700c
  • 2:1 lacing for the rear hub
  • Sapim aero spokes
  • Shimano 8/9/10/11 speed, Campagnolo 9/10/11/12 speed or SRAM XDR 12 speed compatible.
  • Japanese NTN bearings
  • 36 points of engagement and a 4 pawl independantly sprung freehub design.
  • Handbuilt in the shop
  • Weight 1630g for a pair bare

2:1 Lacing improve tension balance, wheel reponsiveness to drive imputs and reduces flex at the brake pads. All the tricks are used to make this a reliable but fast and fun wheelset to ride on. The rear wheel lacing pattern makes this wheel particularly stiff with a reduced tendency to rub brakes compared with other wheels using rim of a similar depth. It also makes it quite responsive.

The hub is a BORG Wheels creation. The front hub has 2x 61901 NTN bearings running on a 12mm alloy axle. 

The front wheel is laced radially with Sapim CX rays (black) and black alloy nipples. Sapim HM nipple washers and nipple freeze are used to ensure rim and nipple longevity. 

The rear 24H wheel is laced 3x drive side and radial non drive side in a 16:8 pattern. Sapim CX force triple butted aero spokes are used along with Sapim black alloy nipples with Sapim HM nipples washer and nipple freeze to ensure the longevity of the wheel. 

2:1 lacing offers the rider less brake rub and a stiffer rear wheel due to the optimised geometry and longer spoke life. Pads are still recommended to be 1.5m. to 2mm from the rim for maximum mechanical leverage.

Shimano 8/9/10/11 speed, SRAM XDR 12 speed Campagnolo 9/10/11/12 speed freehubs available. The hubs use NTN 6901 bearing for the front wheel and NTN 6902 bearing in the rear hub shell. The Shimano freehub has NTN 6902/6802 bearings and the XDR and Campagnolo freehub have 6802 bearings.

The hub uses a large 36T ratchet ring. The freehub has 4 independently sprung pawls. Its loud. I like that and it's also a sign of strong pawl springs, lots of pawls and teeth, this a is a good thing.

NTN is a top tier bearing manufacturer and there bearings are made to very tight tolerances.

The NTN bearings are offered with contacting LLU (red) or non contacting LLB (black) seals. The contacting seals offer better weather sealing but  higher drag than the non contacting seals. Contacting seals loose much of there contact with the bearing above 5 mph. Non contacting seals loose contact and hense let more water and grit in. So expect significantly longer bearing life from the bearings with contacting seals. The non contacting seal bearing are fine though and the type of seal commonly found from other cycle bearings.  I use the contacting seals in my personal set. There is almost no difference in drag on the road. It may be worth a few seconds on a 25 mile TT. Thats the order of the difference. 

All the Campagnolo freehubs offered are 9/10/11/12 speed compatible. All the Shimano freehubs offered are 8/9/10/11 speed compatible and they come with a spacer for 8/9/10 speed cassettes (although an additional 1mm spacer supplied with a 10 speed cassette is needed too).

The XDR freehub is for SRAM AXS 12 speed cassettes. 

The BORG31 2:1 wheelset is supplied as wheels tubeless ready but are tubed tyre comptibale.

Front OLD is 100mm and rear OLD is 130mm.

The Cycle Clinic is a stockist/importer of IRC tubeless and clincher (tubed) tyres. You can opt for any IRC tyres to be fitted to your wheels. Other brands are stocked too. If you buy tubeless tyres of this shop I will fit them and set them up with Maxalami Sealant. Please note if you buy tubed tyres buy tubes also. Below  are links to the tubeless tyres and IRC tubed tyres stocked. 

Continental GP5000TL 25mm, 28mm or 32mm

IRC Roadlite tubeless 23mm and 25mm

IRC Formula Pro RBCC TL tubeless 25mm, 28mm or 30mm

IRC Formula Pro X-guard TL tubeless 25mm, 28mm or 30mm

IRC Formula Pro S- Light TLR tubeless ready tyre 25mm or 28mm

IRC Marbella tubeless X Guard 28mm gravel tyre

IRC Serac CX Sand and CX Sand X Guard tyres 32mm width

IRC Serac CX and CX  X Guard tyres 32mm width

IRC Serac CX Mud and CX Mud X Guard tyres 32mm width

IRC Aspite RBCC clincher 24mm or 26mm (for use with inner tubes)

IRC Roadlite X guard 25 mm tyres (for use with tubes).

IRC Jetty 23mm, 25mm or 28mm (for use with inner tubes)

IRC Boken 36mm or 40mm

Veloflex Corsa Evo 

Veloflex Corsa EVO TLR Orange seal will be used for cotton casing tubeless tyres

Veloflex Corsa Race TLR Orange seal will be used for cotton casing tubeless tyres

Veloflex Corsa Race

If you buy any tyre (with tubes if applicable) I will fit them for you to your wheels.

Wheelset weight is 1630g but dont be fooled into thinking this will make it feel heavy. There more than one way for a wheel to feel light. Making it responsive to torque inputs is one way and the other is to make it so the wheel deflects little under high loads.

Other things to buy if using tubeless tyres

Koolstop pads

Tyre worms 


Sealant injector

COVID 19 update. Overseas shipping is now with a courier only. UPS or Parcel force.

U.K policy

Orders placed in the afternoon normally get sent the next workday where possible. Orders placed before noon are often sent the same day but this is not guaranteed.

Same day disptach is not guaranteed due to volume of mail order. In general we are not operating with big delays in dispatch if any.

  • Standard shipping is with DHL. Cost is £6.00 . Fully tracked with hour delivery slots. 
  • Some U.K addresses excluded from he DPD service Royal Mail is used (1st class tracked). Checkout is not sophisicated enough to know all the excluded postcodes. The areas are Channel Islands, Isle of Wight, Isle of Man Scottlish Highlands and islands (Scottish Highlands - AB31-38, AB40-56, FK17-21, IV1-40, IV52-54, IV63, KW1-14, PA21-38, PH4-41,  PH49-50
    Scottish Islands - HS IV41-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3)
  • Northen Island - Ropyal mail 1 st class signed for is used.
    • Rims are sent by courier only- cost £10. UPS is used. A phone number and email address must be supplied to allow me to book in. This service can also be picked for smaller items that you want delivered by UPS.
    • Wheels shipping cost is £20 (cost of courier + cost of the box) next day. To NI, Scottish Islands, Channel Islands, Isle of Man and that is a two day service.


    Courier services are used only or over seas mail. UPS or parcel force depending on destination.

    The website will provide shipping rates at checkout.

    The import charges you will face are and these will be levied by the shipping carrier or by your customs authority in advance of delivery. Customs clearance will add to shipping times. 

    You will be billed for

    Import duties which are set by the tarrif code we declare. Tarrif rates are normally published on government websites. "Free trade agreements" affect this and for EU customers there are no duties as tarrifs are set at zero for goods like our wheels that originate in the U.K. Goods that originate in the E.U  and are exported back yo the E.U attract tarriffs. Good made outside the e.u and sold into the E.U attract tarrifs. The declared value in GDP will be converted to your countries currency by the monthly rate published by your tax authority. 

    Customs clearance fees -these vary from country to country and also vary by declared value in some juristictions. 

    VAT or sales taxes and applied to  the total of the declared value of goods, customs clearance charges and import duties. 

    This shop declares the total paid for the goods for customs value, no exceptions. We will not declare low values as thats fraud and we will not be party to it.

     A word of warning once an parcel has been shipped any import charges are your reponsibility. Refusal to pay these charges to the parcel carrier mean you loose the right to an automatic refund. We refund at our discretion minus any charges we are levied by the parcel carrier. These charges cannot be disputed by us. We also reserve the right to apply a 10% restocking fee on top of any charges applied to us for the return of the parcel. Therefore once shipped charges must be paid. We can accept no liability if the parcel is lost after charges have been refused to be paid. 

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