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Robert Axle Project trainer thru axles are precision-machined to adapt bikes to wheel-on trainers. Featuring a low-profile design, they are compatible with major trainer brands and suitable for use both indoors and outdoors.
Robert Axle Project trainer thru axles are precision-machined to adapt bikes to wheel-on trainers. Featuring a low-profile design, they are compatible with major trainer brands and suitable for use both indoors and outdoors.
Robert Axle Project

Robert Axle Project TRA213.N NAILD Thru Axle 12x142 and Boost

£75.00
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With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.

Returning an item

Online or in-store purchases can be returned to any of our 12 stores free of charge or can be returned by post or courier at your cost after completing the online returns form below. If you are returning an item due to a fault, we will refund your postage costs.

Bikes & Bulky items

If you wish to return a bike or bulky item to us, please keep the box it arrived in and let us know by contacting our support team via our online webchat, email or by phone (020 45063856) and we will help arrange a collection.

Non Bike - Customer Returns Form

If you wish to return or exchange an item, please fill out the form below following the steps inside. Returns can be processed quicker if all required information is provided.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Robert Axle Project TRA213.N NAILD Thru Axle 12x142 and Boost

Season:All Year Round

Brand:Robert Axle Project

Code:TBRBT213N

Robert Axle Project Thru Axles for trainers are designed to fit specific bikes using minimal washers and spacers. These axles are lower profile than standard trainer thru axles and can be used both on and off the trainer.

This trainer axle is designed to adapt bikes to wheel-on trainers, including popular brands such as Blackburn, Bkool, Cyclops, Elite, Kinetic, Tacx, and Wahoo. Each axle is precision-machined to fit into the bike as well as, or better than, the stock thru axle. They are installed using a standard 5 mm hex/allen key, the same tool carried on every ride.

When it is time for a race or to head outside, simply remove the bike from the trainer, remove the drive-side axle end, and go. The axle is suitable for use indoors or out. Every unit is designed, built, and quality-tested in Bend, Oregon, USA.

Full Specification:

  • Type: NAILD Thru Axle
  • Compatibility: Marin, Polygon, Argon18 (12x142/148)
  • Weight: 94g
  • Installation Tool: 5 mm hex/allen key
  • Origin: Bend, Oregon, USA


If you are unsure which axle you need click here to use the axle finder (opens in new window)

The code provided by the axle finder will differ from the code on the Balfe's website, use the table below to find the Balfe's equivalent code:

Robert Axle ProjectBalfe's Site Code
LIG506.NHURBFL506N
LIG509.FHURBFL509F
LIG510.FHURBFL510F
LIG526.NHURBFL516N
LIG519.CHURBFL519C
LIG505HURBFL505
LIG506HURBFL506
LIG510HURBFL510
LIG511HURBFL511
LIG512HURBFL512
LIG519HURBFL519
LIG523HURBFL523
LIG528HURBFL528
LIG529HURBFL529
LIG502HURBFL502
LIG504HURBFL504
LIG508HURBFL508
LIG509HURBFL509
LIG514HURBFL514
LIG516HURBFL516
LIG517HURBFL517
LIG501HURBFL501
LIG503HURBFL503
LIG507HURBFL507
LIG513HURBFL513
LIG515HURBFL515
LIG521HURBFL521
LIG522HURBFL522
LIG527HURBFL527
LIG603.NHURBRL603N
LIG604.FHURBRL604F
LIG613.NHURBRL613N
LIG614.FHURBRL614F
LIG601HURBRL601
LIG603HURBRL603
LIG604HURBRL604
LIG606HURBRL606
LIG607HURBRL607
LIG608HURBRL608
LIG609HURBRL609
LIG610HURBRL610
LIG611HURBRL611
LIG613HURBRL613
LIG614HURBRL614
LIG615HURBRL615
LIG617HURBRL617
LIG621HURBRL621
LIG623HURBRL623
LIG626HURBRL626
LIG627HURBRL627
LIG628HURBRL628
LIG629HURBRL629
LIG634HURBRL634
LIG635HURBRL635
LIG637HURBRL637
LIG634HURBRL639
DDA201TBRBD201
DDA202TBRBD202
TRA201TBRBT201
TRA202TBRBT202
TRA204TBRBT204
TRA210TBRBT210
TRA211TBRBT211
TRA212TBRBT212
TRA213TBRBT213
TRA214TBRBT214
TRA217TBRBT217
TRA221TBRBT221
TRA222TBRBT222
TRA223TBRBT223
TRA225TBRBT225
TRA226TBRBT226
BOB110TRRBB110
BOB111TRRBB111
BOB112TRRBB112
BOB113TRRBB113
BOB114TRRBB114
BOB117TRRBB117
BOB121TRRBB121
BOB122TRRBB122
BOB126TRRBB126
BOB106TRRBB106
BOB107TRRBB107
BOB108TRRBB108
BOB109TRRBB109
BOB115TRRBB115
FOL110TRRBF110
FOL111TRRBF111
FOL112TRRBF112
FOL113TRRBF113
FOL114TRRBF114
FOL117TRRBF117
FOL121TRRBF121
FOL122TRRBF122
FOL126TRRBF126
KID206TRRBK206
KID207TRRBK207
KID208TRRBK208
KID209TRRBK209
KID215TRRBK215
KID210TRRBK210
KID211TRRBK211
KID212TRRBK212
KID213TRRBK213
KID214TRRBK214
KID217TRRBK217
KID221TRRBK221
KID222TRRBK222
KID223TRRBK223
KID225TRRBK225
KID226TRRBK226
UDH001FMRBUH001
LIG504.FHURBFL504F
LIG518HURBFL518
PLU100HURBPL100
LIG623.CHURBRL623C
LIG624HURBRL624
TRA213.NTBRBT213N
TRA214.FTBRBT214F
TRA218TBRBT218
TRA223.CTBRBT223C
TRA224TBRBT224
ADA001TRRBA001
ADA005TRRBA005
ADA006TRRBA006
ADA007TRRBA007
ADA008TRRBA008
ADA009TRRBA009
ADA010TRRBA010
ADA125TRRBA125
ADA126TRRBA126
ADA127TRRBA127
BIN001TRRBB001
BIN002TRRBB002
BOB113.NTRRBB113N
BOB114.FTRRBB114F
FOL114.fTRRBF114F
KID204.YTRRBK204Y
KID213.NTRRBK213N
KID214.FTRRBK214F
KID218TRRBK218
KID219TRRBK219
KID220TRRBK220
KID223.CTRRBK223C
KID224TRRBK224
KID633.OTRRBK633O
Sizing Information
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