Retrofit to disk brake wheel
Many modern gliders and power gliders are originally equipped with disk brake wheels nowadays. To also make their advantages availalbe for elder aircraft types, we offer retrofit kits from shoe brake wheel to disk brake wheel.
Depending on the aircraft type, the available space varies. With very tight space in the landing gear box, the existing shoe brake wheel has to be replaced by a complete new disk brake wheel.
If there is more space available, a brake disk only can be fitted to the existing wheel hub, after removing the shoe brake assembly.
Retrofit from shoe brake wheel to disk brake wheel
EASA-approved retrofit kits, where the existing shoe brake wheel is replaced by a new disk brake wheel or a brake disk is fitted onto the existing shoe brake wheel.
The extend of delivery includes the full documentation acc. to the Technical Note/ Minor Change Approval with detailed installation instructions, parts list, drawing and EASA FORM 1.
| P/N | Aircraft type | Disk brake wheel | Approval |
| 051412 | Discus a to Discus 2a Discus CS Ventus a to Ventus 2b |
4′′ Classic 110-20 | Tost EASA Minor Change Approval |
| 051415 | LS3 – 8 | 4″ Classic 110-20 | Tost EASA Minor Change Approval |
| 051564 | Mosquito | 5′′ Classic 122-105-20 | Streifeneder TM |
| 051562 | ASK13 | 5′′ Classic 109-92-20 | Tost EASA Minor Change Approval |
| 051570 | Swift | 5′′ Classic 115-102-25 | Marganski SB |
| 051520 | Twin-Astir | Brake disk 170-35-5 | Grob TM |
| 051530 | Astir CS | 5″ Standard | TN 01-2020 |
| 051810 | Piaggio P149D | 8′′ Cleveland 40-98B | German Air Force |
Retrofit to disk brake wheel Penta
The advantages of the 5 inch Penta disk brake wheel – low weight and good servi- ceability – can be transferred to modern gliders with the help of the following retrofit kits. All retrofit kits are EASA approved as Minor Change Approvals.
| P/N | Aircraft type | Disk brake wheel | Remarks |
| 051710 | Duo Discus, Arcus, Nimbus | 5′′ SBP 135-75-30 | ersetzt 5′′ Classic-Rad Tost TM 01-2011 |
| 051720 | Duo Discus, Arcus, Nimbus | 5′′ SBP 135-70-30 | ersetzt 5′′ Beringer-Rad Tost TM 01-2011 |
| 051740 | Discus 2b bis Discus 2cT Nimbus 2 + 3 Ventus 2c bis Ventus 2cM |
5′′ SBP 100-51-20 | ersetzt 5′′ Classic-Rad Tost TM 02-2011 |
| 051742 | Discus 2b bis Discus 2cT Ventus 2c bis Ventus 2cM |
5′′ SBP 100-51-20 | ersetzt 5′′ Beringer-Rad Tost TM 02-2011 |
| 051730 | ASK 21 ASK 21 Mi | 5′′ SBP 125-77,5-11⁄4′′ | Schleicher TM 33 Schleicher TM 5 |
Important notice:
We recommend the retrofitting of your brake system to TOST brake hydraulics at the same time!
You will find detailed information in the chapter “Brake hydraulics”.
Retrofit to disk brake wheel Classic
For the following aircraft types, we offer complete retrofit kits to disk brake that include all necessary components. Please check for an approval previously with your inspector.
| P/N | Aircraft type | Disk brake wheel |
| 051430 | Avo Samburo | 4′′ Gnom 202-30 |
| 051433 | Scheibe SF 25B Slingsby T61 | 4′′ Gnom 212-30 |
| 051571 | SZD-50 Puchacz | 5′′ Classic 122-25 |
| 051572 | SZD-9 Bocian | 5′′ Classic 122-25 |
| 051567 | PW-6 | 5′′ Classic 122-20 |
| 051566 | DG600 | 5′′ Classic 122-20 |
| 051564 | Glasflügel 304 | 5′′ Classic 122-20 |
| 051564 | Kiwi | 5′′ Classic 122-20 |
| 051565 | SZD-45 Ogar | 5′′ Classic 115-25 /115-35 |
| 051570 | Jantar | 5′′ Classic 115-25 |
| 051550 | SZD-55 Promyk | 5′′ Classic 115-25 |
| 051610 | Bölkow 207 | 6′′ Classic 128-1,5′′ |
| 051640 | DR 400 | 6′′ Classic 80/120-50 |
| 051651 | DR 1050/DR 1051 | 6′′ Classic 95/50 |
| 051661 | Morane | 6′′ Classic 95/50 |
| 051510 | Scheibe SF 34 B | Brake disk is fitted to the existing wheel |
| 051560 | Kiwi | Brake disk is fitted to the existing wheel |
| 051560 | Mosquito | Brake disk is fitted to the existing wheel |
The following components are included in each retrofit kit:
- Brake disk or complete hub with brake disk
- Brake calliper with the suitable anchor plate assembly
- Master cylinder
- Hydraulic hose and connecting part
Feel free to contact us if you have any questions regarding the retrofit kits, we will be pleased to tell you more about them.
